4. The sensor itself produces the voltage. 4. I went through this problem for about 9 months. Discussion in '1st Gen. I replaced the fuel pump-because it was bad in July. It only does it below 40 deg. as the underlying issue will worsen, potentially leaving the driver stranded or  13 Aug 2012 CEL was on, got it read, changed o2 sensor (rear), drove about 60 to And after you replace it, don't be surprised if it runs like a craplow idle. Don't care to just start replacing parts. No CEL now. If the sensor is connected properly, both electrically and to the intake manifold, use a scan tool or voltage meter and vacuum gun to check MAP sensor output. I am still having rough idle while my foot is on the brake at stops. Anyways, I'm having an O2 sensor issue… as I've replaced 2 of them and still the same code is coming up (after clearing it) and still saying the same bank (1/2) high voltage and yada yada yada… At first I changed the wrong one… oops Then I changed what I believed to be the right one. The car could be running worse because of it, but I can't tell because of the exhaust leak (whole nother story. 5 volts. i had to reset it a couple of times to turn CEL off. ordered and replaced bank 2, sensor 2 with bosch O2 sensor. Rich with black smoke. It is always the cam sensor code. The sensor I replaced was the Air Charge Temperature Sensor. Replacement cost about $600 : 63860 mi C $400: Faulty O2 sensor replaced at NAPA service centre, for about half what Honda estimated. Some American car makers recommend that the O2 be replaced at 125,000 miles. One before the catalytic converter and one after. Yes you are correct in the passenger sensor has a problem. Dec 04, 2014 · I have since replaced the O2 sensor which was really badly clogged up with soot. On my way back to Tampa the check engine light came back on and the hesitating came back. The problem progressively gets worse until the car will eventually die. Replaced plugs, wires,fuel pump and filter, distributor and rotor, all four oxygen sensors, air filter, and checked compression. Functioning like a monitor, your oxygen sensor works like this: the O2 sensor tip is located inside of your exhaust pipe, the oxygen sensor detects the percentage of oxygen in the exhaust . Tested fine. It (the O2 sensor) has to warm up so if you are getting black smoke at first startup something else is making it run rich. May 05, 2017 · Also see if you are getting voltage from the computer to the sensor wires ? Use an ohm meter and test the resistance on the heater in the O2 sensor . Took it to autozone, they say that it is the O2 sensor I just replaced. I have seen random misfire codes and o2 sensor faults set. Driving on city streets and doing multiple stop-and-go as well as some WOTs on a highway (no need to over-speed nor be reckless) can accelerate the Jul 18, 2012 · is the rear o2 used as a cat efficiency check? i am mainly from the GM 3800 world and the rear o2 on the 01+ cars is used as a cat efficiency check. Long story short, I've replaced plugs, wires, o2 sensor, coil pack, and pcv valve. 1 liter V-6? It appears that this is just an empty slot labled 02 sensor relay. Said 3 injectors were not working 100 % - I've run a lot of injector cleaner through them - Lucas, Seafoam, Chevron didn't help much. I installed a euro premuffler and replaced the O2 sensor with a universal Bosch sensor. May 18, 2012 · Originally when I first changed my spark plugs, they were pretty bad. The O2 sensor does produce its own voltage, but there are also two wires that run the sensor’s heater. It does seem to be a very common problem with these engines. When you first start your car it is running in “open loop”, most sensor data is ignored until it warms to operating temperature(O2 sensors don&#039;t function well until they reach temperature which Your vehicle will have 2 O2 sensors. Since the O2 sensor begins to operate above 600F, anti-seize must work well above this as temps go higher while preventing seizure. p1271. I does it in park, and neutral. When I got the car, it had, I think, a Bosch 7-548961-80 sensor, but who knows how much mileage it had on that sensor. I also measured the lambda readings and the cars behavior during driving conditions before and after the replacement. It sort of like getting your spark plugs from a wrecker. Worked perfectly. One EPA study found that up to 70% of high mileage vehicles that fail an emissions test need a new O2 sensor. Your mileage will suffer. I dunno why, but it seems to affect the O2 sensor - I replaced it just last year, and it started acting up and slowly getting worse this past summer. The light still came on after maybe 50 miles, which was worse than the original one. This is driving me crazy!!! I replaced the B1, S1 sensor with no luck. They are almost al Feb 28, 2013 · Anti-seize will cook until any remaining low temperature product burns off. Now that you know your O2 is good you can use it to finish trouble shooting the problem! RE: O2 Sensor Problem IP: Logged Message: For starters, learn basic english. Fiance’s dad cleaned out the mass air flow sensor and ran the car a bit more with the old O2 sensors on and the car was running great again, but check engine light came back on with same old codes. As Kevin pointed out, it could run more efficiently without it. See number 2 concerning the O2 sensor harness. But there may also be benefits to replacing the O2 sensor periodically for preventive maintenance. Also replaced all spark plugs. There are many others, but these are the most popular. The wiring, and screen with the pump, in the tank. May 28, 2008 · My 98 K3500 with 161k was throwing a lot of codes. Diagnosed as faulty O2 sensor. Logically, they will wear at the same rate so the rear will need to be replaced soon after the front and vice versa. Satisfied with that because of your response I gave the go ahead for the next day when the part came in. It is a compromise for South and North USA (Yeah you don't upset the South with hot thermostat, and you barely make the North happy ) I have better fuel mileage because I just changed to Bosch sp plugs. 4 expedition, running lean I have a ford 2003 windstar that was running very rough when cold and almost stalling. So frustrating! I don't really feel like shelling out $200 for a Subaru specific O2 sensor and have it not end up being the culprit. I bought the BOSCH universal sensor and installed it correctly. Their main purpose is to measure the cat efficiency. The O2 sensor was not replaced at the same time because it was still in the mail. I replaced it because I thought it might help with some power issues I was having and also the old one had a crack in the sensor. Today I went to connect new Power Vision and it said specifically to place black tip tp rear. Spark plugs recently replaced. Common CKP DTCs include: P0335-P0339 and P0385-P0389 May 04, 2020 · Tire Pressure Sensor Symptoms. If you have a standard economy vehicle, you can expect to pay anywhere from $120 to $500 for replacing your knock sensor. You would pay at least $50-100 for a decent sensor, even more if you go genuine, any less could be risky. 50,000km later - still driving it and it hasn't really got worse, but hasn't got better. continuously monitored system DTCs mode 7. The engine acts the same (missing/stumbling and running rough at idle) regardless of whether or not the front O2 sensor is connected. This morning I just fitted a new maf sensor and now the car is running even worse, sounds as if it's going to stall and black smoke is now coming from the exhaust. F. There's also the residue, most likely from PB blaster cooking off as the over spray went everywhere. I have a 2005 Nissan Altima with code p1272 . After about 20 minutes it gets to where it barely stays running when it sputters, but there is still the 10-30 seconds between sputters. You’ll have to look up a chart to measure voltage against no vacuum and full vacuum. If it is a faulty O2 signal then running the computer in open loop should just force the system to run off of the tables. Sharing the name of the original full-size SJ model, but without a traditional body-on-frame chassis, the XJ instead featured a light-weight unibody design. When the SES light comes on it generally refers to an eviromental problem -O2 sensor, Gas cap not sealing, MAF sensor and so-forth. the oxygen sensor heater does show ready. Mar 28, 2008 · Worse mileage, worse performance with a new one vs. Maybe in a stock app it'll be fine, but modded stuff may not like it too much. Have A Glance Over Check Engine Light. The car throws different codes between all of this. CCV - I saw you replaced this - all of it or just the valve? 3. If I unplug the MAF sensor, the idle goes back to 1000 RPM with no sputtering, but, of course it won't go over 2300 RPM. I replaced it with the correct Denso part as spec’d on their website since these ULEV engines are very picky about which sensor to use. Your O2 sensor sees this and the ecu tries to compensate but since it still doesnt know the EGR is open it will fluctuate. If the mixture is too rich (too little oxygen) or too lean (too much oxygen) than the oxygen sensor sends a signal to the ECU telling it to adjusts the Your motor only has 1 bank so it means the motor is running rich according to the bank 1 oxygen sensor. It would idle ok but run like crap in gear and to drive it home I had to hit the gas  Remove your car's oxygen sensors from the exhaust system (temporarily). I hope I can clean the original to have a spare. - Cleaned ICV. One of my trucks had a horrible time with this and I ended up pulling the vac line and capping it and just making sure the egr was closed to start and now the truck doesnt have idle issues. Then, go buy a pipe plug for the rear O2 sensor hole, remove the rear O2 sensor from tailpipe, but leave hooked up to wire harness, use plastic zip ties or something to tie the O2 sensor to the frame rail. Jun 13, 2009 · I got the Denso sensor today, and replaced the O2 sensor on my car. Diagnostic trouble codes. didn't think it could be the O2, so fiddled and fiddled and fiddled trying to find some other problem that didn't exist. May 31, 2019 · Sensor. Fuel was coming out of the vacuum port. 22 14. I've had to replace an oxygen sensor before (2 years ago) and had recalls completed on my car for a faulty crank position sensor (about two years ago as well. All the posts I have read regarding MAF sensor problems actually indicate the car stalling and not Feb 17, 2012 · I got the code P0141 when I took it O'Reileys. Thanks. Took the jeep from Tampa to Gainesville with no problem. Any O2 sensor that is defective obviously needs to be replaced. Also the wire that runs to the sensor from the ECU is not powered. ? Oct 09, 2017 · In late August I replaced the original O2 sensors on my Jeep just for the heck of it. Many older-style MAF sensors have a screen in front, not so much for protection but to straighten the flow of air through the housing. All seems to work well so far. Sensor issues - Everyone tries to avoid these ones (probably because of cost). This is the most serious of the symptoms that could occur. If everything else is working properly, open loop simply means worse gas mileage due to slightly less efficient combustion. Your O2 sensor looked fine the other day, it was a little choppy, but still looked good. The car runs ok when cold, but after a few minutes (usually by the time I hit the first stop light), it will idle erratically and sometimes stall. i argued with them for a while and they finall replaced 2 O2 sensors under the warranty. 1 Apr 2015 Although most new vehicles have multiple oxygen sensors, replacing them is engines to ignite the fuel mixture needed for the engine to run. At idle or at 2 it runs nice and smooth. I'm guessing egr valve, O2 sensor(s), map, another vac leak, IAT sensor and of course optijunk or puter. When I first tried starting the car, it would barley run and I had to crank for several seconds to even get it to catch. They told me that I should wait until it got worse and bring it back. When you replaced the O2 did you make sure the connector was not corroded, mine was. In the picture you can see the small threaded hole, or bung, that the O2 sensor fit in right at the "Y" portion of the exhaust. Replaced it with a factory sensor from the dealer and all is well. com: Would a bad 02 sensor cause the mustang to run sluggish stall out and not stay at a steady It ran worse and now engine lite is on all the time. But a Windstar O2 sensor can be found dirt cheap in any wreckers. Throws CEL only when cruising on highway at constant speed. The intake piping could have developed further damage when it was moved for the (probably) first time in 13 years, worsening the issue. $100 O2 sensors are not $3-$4 spark plugs. Replacing an aging O2 sensor that has become sluggish can restore peak fuel efficiency, minimize exhaust emissions and prolong the life of the converter. I think the sensors are like 7. Things got weirder today. g. You have a catalytic converter issue. But I kind of want to get it fixed, and just wanted to see if anyone else has had this issue. Now it runs just fine. Idle was rough and RPM’s would dip low. If there is Check Engine Nov 24, 2013 · The A4 O2 sensor is the one I am using. Bad o2 sensor symptoms chevy Dec 13, 2011 · When I first got the AX-IED, I replaced the O2 sensor as it was 22 years old and 35,000mi and I just wanted to be confident I had a good responding O2 sensor. Jul 29, 2012 · The O2 sensor probably failed first and did not set an O2 fault code, but went straight to the 'fuel system lean' code. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. If it was me, I'd replace them (as I already did). Unfortunately I sought the assistance of Auto Zones employees and replaced my MAF sensor and o2 sensors to no avail. In my case the car was running poorly last summer and eventually the O2 sensor threw a code. It gets more interesting, though. Undo the bad front O2 sensor and replace. Sometimes an O2 sensor fails, and you need to replace it. I just taped it up until I could get an extension. A bad O2 sensor can disrupt combustion and cause misfires. Then check fuel pressure, and go from there. I returned the O2 sensor that had the high resistance reading than spec and got a new one, replaced them. 2) How did the engine run? When did it get worse? Ran great! I did all the work on the car myself. notice, immediately take the car to the repair center before the condition gets any worse. Heater line is a brown wire on wiring side and pink wire past the connector. If no trouble codes are present indicating a sensor problem, what else could it be?!? This motor is cursed. . Replaced it and all was good. Neither were clogged but I still replaced. Could eventually be a dirty idle air control motor plunjer and air canal. I have checked for vacuum leaks, even pulled the intake and replaced the plenum gasket. Came back a mo P1127 Exhaust Not Warm Enough - Downstream O2 Sensor Not Tested - Read Our Article on Oxygen Sensor Codes For Help With This Lincoln Check Engine Light Code P1128 Upstream Heated Oxygen Sensor Signals Reversed - Read Our Article on Oxygen Sensor Codes For Help With This Lincoln Check Engine Light Code The twist connectors make for a poor connection, also you have to cut the original cable in order to wire it up, which is just begging for problems. If the sensor is incorrect or faulty, the computer will make incorrect adjustments to the fuel map and the car will run badly. The Air/Fuel Ratio Sensor does the same only it can operate over a wider range of air and fuel mixtures allowing for better fuel control and emission reductions. 8 can (up to 1 litre every 1k miles after 40k miles), mine does consume a bit. Once the sensor was replaced, the car passed emissions but still did not drive well. The Jeep Cherokee (XJ) is a compact SUV that was manufactured and marketed by Jeep from 1997 to 2001. Price is a little steep. That should determine the problem. I replaced all fuses with Sep 02, 2014 · Crankshaft position sensor: rimskittle: TDI 101: 2: April 11th, 2013 17:05: Replaced crankshaft position sensor now car runs worse than before: Thermo1223: VW MKIV-A4 TDIs (VE and PD) 5: April 12th, 2012 14:42: OEM BEW G28 crankshaft position sensor F/S: turbocharged798: Private TDI Items for Sale/Wanted: 4: January 25th, 2012 05:39: Crankshaft In reply to wvumtnbkr: Rob thanks for the O2 sensor tip Jan. I want to say a couple weeks after the build the car was running fine, now for the past couple months the car has been running like (as if) it is congested: stumbling, hesitating, LIL sloppy idle, and rough starts both cold and warm. A rich engine mixture causes the vehicle to run hot and creates pollution. The heater is necessary because the O2 sensor only begins to actually work properly when it gets to around 800 degrees F, and it takes a long time for the exhaust to heat it this much, so an internal heater is used to speed things up. I got the Check engine light first thing yesterday morning, after filling up the gas tank the night before. Now after letting it sit and coming back to mess with it, it Jun 13, 2018 · Any time you’re investigating crank sensor issues, it’s critical to verify the CKP circuit. I'm just tossing out that idea. Now today on my way home from work, the check engine light came back one and yes, it is the same alarm. If it saw the O2 telling it that it was lean, it would have dumped more fuel in to compensate. Ran lumpy but no M. This means the sensor can only read a limited range of mixtures (rich, lean, and optimal). A new sensor should set you back around 50-100 bucks plus a few minutes to install it. I did not get a CEL for a bad O2 sensor for weeks, but when I finally did, I replaced it, and the problem was solved. nathansbmwworkshop. The only code is when I run without the O2 sensor-codes for O2 sensor. 1999 Tacoma 4x4,3. Foreign car builders also recommend replacement at varying mileage. The upstream sensors typically fail long before the downstream sensors do, and those are the ones I replaced. You can check easily to see if it is NOT the sensor by just unplugging and running the car, if it runs worse like cold start then the sensor was working properly if nothing changes it may or may not be the problem. Anyways ever since they fixed an issue we previously found out the car still runs great but the brake lights while driving or even in park will turn on. Truck runs fine any other time of the year. Replace them at that mileage. Nov 29, 2007 · My O2 sensor on the turbo manifold went bad. Replaced the Opti and it runs the same. The 2003-2004 models use an Oxygen (O2) sensor to monitor and adjust fuel mixture. Jul 18, 2020 · Comments: i recently got a code for P0161 . it does not just monitor the flow, but the car runs a routine which it changes the fuel mapping slightly to check the cat and to see if the o2 sensor is responding correctly. Sent from my SM-J700P using Tapatalk Mar 06, 2018 · This thread does help a lot, having diagrams and such to reference to as someone is trying to diagnose that code. I had an O2 gauge tapped into the O2 signal on another Digifant car I owed that ran fine for years. You may be able to test the oxygen sensor at home using a digital multimeter. Put a second one in and runs fine then passed its mot. A bank 1 rich code would be due to a vacuum leak, a bad O2 sensor or a bad MAF or MAP sensor. Try not to touch the sensor surface with your hands as grease and dirt from your hands can damage it. It is running very rich, blows black smoke rich, and when it begins to warm up it starts to run rough and acts like its loading up. My research lately has found several people have had issues running non-OE-spec'd sensors. -e Jun 22, 2020 · The mass air flow sensor is a fairly small part but not the cheapest to replace. Hi guys, I need some help. Started with a bad cat which I replaced. In general, O2 sensors will gradually lose efficiency as they wear out or the sensor probe gets clogged with contaminants. - Cleaned the fuel injectors offline. I recently defatted my head pipe and thought I replaced the sensors correctly. Runs great! $378 repair + $112 + $184(2 diagnostics I dunno why, but it seems to affect the O2 sensor - I replaced it just last year, and it started acting up and slowly getting worse this past summer. replacing the O2 sensor will likely not solve your high idle issue. The only 2 vacuum lines I pulled off were from the wastegate, one at the very top of the bell part and one on the bottom edge. If you eliminate it, then your engine will not have to work so hard to push exhaust out of the cylind O2 sensor I was looking through old posts regarding oxygen sensors. ? I have a 03 pontiac grand prix,needs to be inspected took it to a freinds shop,check engine light was on. How to Diagnose a CKP Sensor Issue. I put a new Bosch unit in my '90 5. Plugs,cap rotor,wires. On start-up the car is rough but after a few seconds runs perfectly. Which is fine, the engine can run fine in open loop, probably wouldn't even  The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. The check engine light came on and I got the codes po174 and po171. Mar 08, 2010 · What would make a New o2 sensor make the car run worse then the old o2 sensor. I did not have the torque wrench, so did that part manually. Lots of misfire codes, and intermittently: "coolant thermostat jammed open", "o2 sensor control limit", "cat convertor efficiency". I have of course done the normal tune-up. It would barley idle, then die after about 10 seconds. The easiest way of knowing you have a bad O2 sensor is scanning the ECM for DTCs. Saturday Jun 04, 2011 · My 2. Also, the IAC has been cleaned. Bought a cheap Ebay Denso Oxygen sensor and the problem got worse but after taking I replaced them by color, but the front driver sensor doesn't reach. Then I started having issues on restart. Needed to be replaced. The parts cost will be anywhere from $65 to $200, while the labor costs will be anywhere from $50 to $350. Has 300,000km on it. My car had O2 sensor codes so I replaced my original sensors with the Denso. I read many forums and ended up replaced the map sensor, alternator, crank sensor, idle air control as well as the cam sensor. This depends on how bad the car is running. I went ahead and ordered both sensors, and replaced the post-cat today. If this screen is damaged, the MAF sensor will tend to over-report airflow. When the rain stops, I'm going to swap plugs and see how it runs. 17 Jun 2019 The right proportion is needed to make sure that certain things run well. This will probably set another code . When I replaced my exhaust & sensors, I used Bosch sensors- I've always had great results with them, and they did invent the O2 sensor! But, for almost a year I was having weird hesitation & stumbling issues throughout the RPM band so I begrudgingly did two things: bought a Tactrix OpenPort for datalogging, and some new Denso sensors. 0 doesn't suffer the same type/degree of Oil consumption as the 1. robinsonsauto 76,403 views. 2002 Focus ZX5 181,000 miles P0171 System too lean Bank 1 My car runs pretty decently, but it idles pretty bad. i was at a light 2 months after i bought it and my jeep died on me, it was also getting really bad gas mileage(5-7 city) i took it to the dealer and they said it was due to my K&N Filter and Flowmaster exhaust. Jul 22, 2010 · If the car starts smoothly w/o MAF yet runs very rough with the new sensor, then your sensor from eBay is bad. Helped start and smoothness. When you give it some Rpm's it gets a miss and when returned to idle it dies. Tacomas (1995-2004)' started by Thelumberwagon, Jul 12, 2011. Helped some. Guess what? O2 sensor at manifold. Going to a 4 wire 'cause of headers. If there is any air getting in after the MAF, the engine wouldn't be putting out enough gas for the amount of air it is getting. So I replaced it with a cheap after-market O2 sensor. I've checked every Yes. i had the same problem with my O2 sensors. Low fuel pressure will get much worse at higher rpms. It was a "universal" type and came from Bosch with a splicing kit to use the old connector. - Ran Chervron Techron complete fuel cleaner. But they are VW sensors, 17014, and run about $40. So we ordered a O2 sensor via ebay special and installed it. On the 8th gen Corollas - this code pops up pretty often and doesn't affect driveability. I had them change my sensor, drove 10 miles and my check engine light came back on, so I figured it was the catalytic converter. When checking it looked gray so I took them out to switch, problem is they both look gray? 2014 Ultra The computer then indicated that there was a faulty O2 sensor which they replaced my cost was over $650. Once you've replaced your vehicle's O2 sensor, you'll need to reset the ECU so it can properly gather information from the new O2 sensor. Post the results , for some one here that knows more about this than I . Adjust the throttle sensor, with the throttle completely closed, to 0. On most 1996 and newer V6 and V8 engines, there are at least two upstream O2 sensors, and one or two downstream O2 sensors. Did some research and this most commonly meant the pre-cat O2 sensor was toast. O2 Sensor P1151 - O2 The minute I fixed that O2 sensor the thing started running worse than it was and threw a lean code from the front O2 sensor. 0 vvti is on 89k and I had to replace an O2 sensor a few months ago, cost £140 from Toyota and I fitted it myself. Also, the problem is temperature sensitive. The fluctuating stopped. o2 sensor code 44 (lean) Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. changing an O2 sensor, or tweaking the engine tuning. The WOT switch does bypass the O2 sensor and runs the DME in open loop mode, so that's probably why it ran well only with it pressed when the O2 sensor was plugged in. YMMV. A couple of weeks ago, the check engine light comes back on. If you do have a failed oxygen sensor, follow these steps to replace it. Misfires. Bank 1 sensor 2 is the one on the catalytic converter. My stalling issue is definitely not as bad as it was before the cleaning but the symptoms are still there. I strongly considered splicing in a universal but just shelled out the extra $ for the genuine one instead--it was still well below $100. Jun 05, 2019 · The O2 sensor plays a vital role in boosting fuel economy. also replaced both up and down stream 02 sensors , MAF sensor and the fuel pump, cleared the codes with FIXD day later same code came back the only thing I didn’t replace is the throttle body fuel has a internal filter. 7 Chevy TBI and it runs worse than the original AC Delco unit. I have replaced just about EVERYTHING you can think of electronically from the fuel pump to the spark plugs. It runs great cold and it seems like after about 7-10 minutes of driving it starts sputtering a little, getting much worse as it runs longer. We had a engine light come on and the codes indicated bank 1 sensor 1 O2 sensor. I replaced it with a Bosch sensor, from a local parts store. On the advice of people from this forum I have replaced the vacuum lines, changed the coil packs, spark plugs, O-rings on the fuel injectors and all of the filters. Once removed it was obvious that the O2 sensor was toast, as it rattled with a broken part inside. O2 sensor is only thing I have not checked or replaced. That sensor is before the Catalytic converter in your car so the exhaust leak you have after the catalytic converter wouldn’t affect that reading. The Disable O2 settings removes the fault code and allows you to remove the O2 sensor from the bike without going in to limp mode. O2 sensors that are failing tend to read lean, which causes the fuel system to run overly rich to compensate. Just for grins , See how the engine runs with the O2 sensor unplugged . The engine is simply running in 'open loop,' meaning it is not taking O2 feedback into account. Get to the engine management system where the screen illuminates for any malfunction. so I thought Heated oxygen sensors should be checked or replaced every 60,000 miles, while unheated or one wire oxygen sensors should be checked or replaced every 30,000 miles. The catalytic converter builds up back pressure in your exhaust system. I also noted that through AlfaOBD it indicates the second 02 sensor as closed loop when fault clear but with engine light on this changes to open loop. That's the one downstream from the catalytic converter. And also the throttle position sensor because for some odd reason that thing failed at the same time. Changed my upstream sensor in my 2012 Ford Focus, and my check engine light went off. Your car will run just fine at wot because the ecu switches to open loop (ignors the O2 sensor signal). 2L. See this page for a list of common oxygen sensor contaminants. Depending on your emissions rating which you will find under the hood on the label the pin configurations are different. I started the car again this evening, and took it for another drive. - Replaced fuel filter. Check the grounds, also, the sensor draws air from where the wires go into the sensor, if this is plugged with dirt you need to clean it. So then there is an other problem yet to solve. Jun 07, 2020 · Have you tried unplugging the O2 sensor and driving like that to see if the problem is still there. Changed the downstream sensor with this part and the light came back on, and was running worse than before. Code P0135 HO2S Heater Performance Sensor & Code P2A00 HO2S Performance Sensor - O2 sensor failed. 10 Jul 2020 Replacement of a good Oxygen Sensor (O2) is a common mistake of other systems that operate together to make the engine run efficiently. It ran worse than before, especially at times, I would push on the gas and it just didn't seem to increase the RPM/power, then it would just "kick in" and accelerate the way that it should. Apr 08, 2011 · Once you get to this point the rest is easy. If your CKP sensor is failing, the first thing you might notice is the MIL (malfunction indicator lamp), usually with CKP diagnostic trouble codes (DTC). When the engine stalls out completely, the "Check Gauges" light comes on. May 28, 2015 · Secondary air check valves- Both valves were inspected and replaced due to carbon buildup. It runs very well now. Turn on the ignition and set the voltmeter to the 12-volt scale. 3)F3ZF-12A650-FA (later replaced by FB), catch code C3W1, derived from 1993 auto trans Mustang. There is a lag between the computer receiving data from the crankshaft position sensor and applying it, so it takes the car that little bit of time to accelerate. I have tried the ECM reset by disconnecting the battery cable from a few minutes to overnight to no avail. If I was to start over I would get the air right, o2 sensors and maf. After a technician completes the diagnosis, they may recommend one or more sensors to be replaced. Then Mass air flow sensor, new AC Delco platinum plugs, new Auto Zone plug wires, New NAPA distributor, tried switching NAPA cap and rotor with new GM brand. You may run too rich, but that won't hurt tour engine for a while. My check engine light came on and was solid, not blinking, my mechanic reset my sensors, but it didn't help. Going to have a look on the weekend if cleaning it up resolves the issue. So I took it off, unplugged it and replaced it with a new one. com CLICK HERE TO BUY YOUR NEXT CAR PARTS FROM  20 Sep 2013 for the first minute or two and then starts running worse and if driven, will If I warm the car up, shut it off and disconnect the O2 sensor, it seems to I replaced the CTS and now the engine runs pretty smoothly at start up;  When your oxygen sensors fail your car will run less smoothly, get worse mileage , and have worse emissions. They are both lambda probes that use internal (exhaust stream) vs external (ambient) oxygen measurements. I am currently on my 3rd upstream o2 sensor and have gone through p0031 and p0032 codes. I have done all of this work myself, as I am retired and trying to save on car repair bills. An O2 sensor that has gone bad will likely set a code and turn on the check engine light. ) I've got a direct fit sensor arriving tomorrow. The reason I ask this is because a bad O2 signal to the ECU can mess up the fueling. 4 V6, 160K miles My CEL came on the other day and the code was P0135 which indicated a faulty O2 sensor. How often the oxygen sensor needs to be replaced will be determined by the age of your . Oct 08, 2012 · The car runs fine for the first 10-15 minutes then it slowly begins to give me issues. I find the price for the new part online ranges from $40 on up. Did you check for any fault code using the key dance? ( ignition switch off/on 3 times and leave it in on at the third time. Which would explain the rough idle and why the o2 sensor is throwing lean. Jul 08, 2020 · Hey all, I'm having some bad power loss issues. The code was P0141, heater circuit in bank 1, sensor 2. Thankfully, replacing the oxygen sensor in the Acura TSX is an easy job that only requires a couple of tools and a few minutes of time. It only does this on the interstate. I ordered Delphi sensors and shortly after on startup the Jeep would stumble and run poorly for a couple minutes, when driving it would stumble and cut out but after a couple minutes it would run fine. Ground wire is black. Since you are experiencing drivability issues - I would suspect the problem that caused your front O2 sensor and cat to be bad before was not fixed and has possibly damaged them again. Tighten the bolts just enough to allow the new sensor to slightly move back and forth for final adjustment. how long after replacing the sensor should the check engine light go off? September 1, 2016 Followup from the Pelican Staff: Three consecutive drive cycles without a fault or 40 key cycles - Nick at Pelican Parts Aug 03, 2016 · Thank you. Refit the mass air flow sensor to the car. The more annoying symptom is that it has bad surge from idle to 2k. the old one. Stick with the Bosch one. It's been over 4 days and more than 50 miles but the check engine light is still on. Maybe dumb question, did you replace the bank 2 sensor 1 with an air/fuel ratio sensor or an O2 sensor? Sensor 1 is an a/f ratio sensor and sensor 2 is an O2. You might feel that the engine runs rough or vibrates at idle, say, when you're sitting at a red light. I am not saying that these O2 sensor codes never require the replacement of the sensor itself. And worse, the downstream sensor was mirroring the upstream, which made me believe the cat was failing. So we pulled out the O2 sensor and it was vaporized. Jul 17, 2007 · Car runs like crap. went to autozone and they read the codes for free and told me it was running lean on Bank 2 also. I am going to try running a tank of high octane gas through my car next week on my drive from VA to GA. Runs great! $378 repair + $112 + $184(2 diagnostics O2 sensors lose their efficiency over time and should be replaced every 80,000 to 100,000 ks so second hand sensors are most likely in the should be changed category anyway. The Tundra uses 4-wire heated oxygen sensors. They were easy to do, providing you have an O2 sensor wrench. Took car to an out of town Mazda dlr. electric control unit id 10. When the sensor completely fails then the internal computer will have a malfunction code. Go to an autoparts dealer that will do an OBDII check for free. -B- Oct 06, 2016 · o2 sensor heater circuit fault - Chevy S10 this applies to many makes and models - Duration: 22:47. May 31, 2020 · I have been getting O2 sensor trouble codes (13) on the highway, the light would come on and stay on until either I shut it off or it cooled down at slower speeds. Or well correct one… The post-cat O2 sensor is pretty much dead, and the pre-cat sensor is working, but not as good as it should. I recently started having cat and o2 sensor codes pop up. Had it in another shop, and they did an intake manifold clean but didn't help. Aug 09, 2017 · ALWAYS follow these tips when installing O2 sensors! These oxygen sensors are very expensive, sensitive, and have to be handled with care. While 1mpg change is very hard to measure, 3-4mpg drop is totally unsubstantiated. Feb 27, 2002 · The O2 sensor might be reading right but there is something else in the "loop" that prevents the ECU from correcting itself. The odometer will show a fault code, or "DONE"when all ok. The truck seemed to run worse after the rear sensor was replaced. Problems with vehicle turning off seemed to go away but now I have a rough Idle. He reset the light and all was fine for a few weeks. I've been driving with one new, three original O2 sensors in the car the past 50K miles, did not notice any change over the years since new. My round trip to work is almost 100 miles. Some engines may have as many as six O2 sensors. I erased the codes, so I can't tell you which Nissan code it threw, but I assume it was an O2 sensor code. This is troubling! Any idea why replacing both 02 sensors did not solve the problem. Not only that but an irregular power supply, dirt, heat, and dust can greatly affect the performance of the sensor. If MAP sensor output doesn’t match the chart, it’s safe to say the sensor should be I'm having some misfire and oxygen sensor issues that I wanted to run by the forum. Hi all So i replaced my O2 sensor yesterday. Under normal circumstances, the O2 sensor will respond within milliseconds to tiny changes in oxygen content in the exhaust. Jun 17, 2019 · A failed O2 sensor always cause damages to the emission system and hence takes down the overall performance. It never went to the shop, not once!! natuarally there is an O2 sensor before and after the Cat on the manifold in order to avoid the P420 Check engine light "Catalyst Effeciency Below Threshold" i used two anti-fouler plugs on the lower O2 sensor. Idle problems seem to go away when maf sensor is disconnected. Code P0496 Evaporative Emission Purge solenoid stuck open. In reply to wvumtnbkr: Rob thanks for the O2 sensor tip Jan. Things to note: - thousands of misfires in 1 , 3 and 5. This sensor reads at a smaller range and is a narrow band sensor. Once it warms up, the computer starts accepting readings from the O2 sensor and makes fuel adjustments. Yup. Often you can narrow down diagnosis using the set trouble code. A sensor is an electrical component and therefore something that can deteriorate with age. Sep 04, 2017 · Running without the O2 sensor the car runs a little worse than with the new sensor. I clear the code after it stops chugging and running rough or not starting, because it runs great most of the time. Jul 24, 2002 · Bad O2 Sensor--96K, $30 Driver's side CV joint clicking--115K, $95 Clutch slipping--112K,$140 Bad Mass Air Flow sensor--130K, Junkyard replacement from car with 50K miles, for $40. 22:47. Once an O2 sensor goes bad, it can result in not only a rough idle and overall poor running of the engine, but also worse fuel economy and pollution. Honda makes this thermostat (75 C) for both Legend and Odyssey V6. 2015 Malibu 119k miles. Spend the $80, and try it out. i replaced today, cleared CEL using BAFX bluetooth OBDII scanner, and when i start the car, CEL if off, but if i shut off and restart the car, it comes back on. 4 - Intermittent Starting. Any idea why replacing both 02 sensors did not solve the problem. Found codes P0134 no o2 activity B1S1, P1166 Lambda bank 1 control limit, P0304 cyl#4 misfire, and P0030 o2 heater circuit problem B1S1. I put old one back on still worse then when i began. I even tried spraying MAF sensor cleaner (didn't have carb cleaner) while engine is on on various parts of engine; no fluctuation on engine RPM observed. Then you would know if the o2 sensor was the problem. I cannot confirm this, but I was told that the universial o2's might interfere with your engine computer. Since then my trusty Jeep Apr 12, 2016 · During a full-throttle acceleration, the O2 sensor would normally indicate rich A/F ratio, but it won’t if the MAF is dirty. I'm being told by the local repair shop that the check engine light is due to a failed downstream oxygen sensor, and that the part is over $100, with the total cost of the repair at $250-ish. My original O2 sensors were replaced about 2 months ago; 177k miles and started throwing an O2 sensor code around 170k miles. Aug 05, 2002 · I repaced the sensor today and it totaly fixed my car! the car runs perfect! I have been driving the car around for about 2 years with these problems , I just fugured my engine was getting old and eaven on my last birthday bought a intake to mask the sound of the slight pinging! these sensors must just take a wile to go out and its so gradual you cant eaven tell untill your car starts smoking Dec 18, 2005 · This problem is intermittent which makes it very hard to troubleshoot even for the dealership and other places I have taken it. The mass airflow sensor can turn on the check engine light and set some strange codes. And with that the Fuel Filter. I replaced the oxygen sensor the code suggested it was a o2 sensor not heating in start up. After that, both sensor started failing. New fuel pump, the vehicle runs great the guy is real happy cause he's been driving this vehicle like that for about 4 years. I suggest you to buy one that works for your car instead of getting a "universial" one. The good news is that it’s usually located near the top of the engine and DIY replacement is easy in most cases. They are well priced and have lasted thousands of miles and years! SOURCE: location of O2 sensor in bank 2, 99 5. - Tested O2 sensor. God bless Wyr Feb 12, 2008 · I just changed the MAF sensor and as soon as i changed it the car is running ten times worse, do I have to reset the computer or reprogram it,I placement it myslef since its a easy job but I didnt do anything else except replacing the sensor, do I have to reset the computer? and what does this mean cause the car''s SES was on read the code it was the MAF now that i changed it its worse, by the Dec 17, 2006 · P0420 and P0430 refer to the downstream O2 sensor (after) the precats. See our oxygen sensor page. If it is not within spec replace the sensor. They have an expected life of approximately 100,000 miles. Jan 22, 2020 · I have already replaced the spark plugs, # 3 and #4 fuel injectors, and the O2 sensor-upstream. The O2 sensor was mounted on a little flat metal stem off the intake manifold, and some oil from an iffy valve cover gasket had seeped down the underside of the stem and found its way into the O2 The oxygen sensor or O2 sensor as it is often called reads the oxygen content in the exhaust, sends a signal to the engine computer which fine tunes the fuel mixture. your catalytic converter has failed it cannot be repaired and must be replaced. These are usually more obvious at low cruising speeds. They are all the same sensor, just the wires and connector differ. As for the coolant temperature sensor, I actually replaced that about a year ago when trying to fix another issue that turned out to be my thermostat. Sep 16, 2017 · If the MAF sensor has detected incorrect airflow, you could have a vacuum leak, stuck open EGR valve, incorrect fuel pressure, or even a bad O2 sensor reporting incorrect air/fuel ratios. Get to know the symptoms that depict a bad O2 sensor so you can take further action-1. The car was reacting much quicker with the new O2 sensor. On pins number three and four measure the resistance for the heater circuit. Worse Better ultimately diagnosed as failed O2 sensor which was replaced last week" The serp belt runs around the inside of the compressor. While it was running and the RPM's were fluctuating my father unplugged the MAP sensor. O2 sensor I was looking through old posts regarding oxygen sensors. Car works fine and no check engine light. A bad O2 sensor will really mess things up under idle, part throttle and cruise because the ecu runs closed loop (uses the O2 sensor signal) under those conditions. I changed the 02 sensor next to the engine block (before the catalytic converter). Page 3 of 3 < Prev 1 2 3. O2 sensors- I replaced both pre cat O2 sensors because both had 100,000+ miles. If the car runs better then it is part of the O2 feedback. I pulled off and unplugged the oxygen sensor and tried it again. Since it doesn’t take that much time for a professional mechanic to do the replacement job, the labor rates are typically low. ) So is it possible that I just got them crossed? Nov 14, 2008 · The check engine light came on in my 2000 Toyota camry, so I brought it to the mechanic, he ran a check on it and said it was the O2 or CO2 sensor( I can't remember which one he said at this point), that it wouldn't hurt the engine but I should think about having it replaced. Post Reply. I replaced the O2 sensor, had the code cleared and drove back and forth to work for 3-days. You could get much worse millage like this. At this phase, replacing an oxygen sensor is mandatory. Even though I changed them with new ones the problem still persisted. Smoothed idle out some. Jan 24, 2016 · Signs You Need a New O2 Sensor An illuminated check-engine light could be a sign of a more serious issue, such as with the catalytic converter, or something as minor as a loose gas cap, so further Oct 28, 2016 · Check engine light indicated mass air flow sensor. It has been a couple of years and they function well. Never has fixed it. Apr 03, 2011 · There seems to be a feeling on various websites that the ECU should be reset if 'significant' changes are made, e. The car has always run better with the MAF disconnected but last night it started running really rough. In fact on all vehicles with very high mileage and original parts the sensor could very well be the problem. They suggested I have the timing belt changed becau" replaced O2 sensor" Mechanic says it's an oil leak that doesn't need to be fixed until it gets much worse, but I have changed the O2 sensor,throttle positioning sensor,MAP sensor,idle air control valve,fuel pressure regulator,plugs,wires,cap,ro 1 996,chevy,350. However, when the MAF sensor malfunctions some faults will actually be symptoms of the root So far I have replaced the spark plugs and the front O2 sensor, the problem is still there and the CEL is still coming on. Great. Stalling As seen with rough idling, sometimes crankshaft position sensor problems are worse at low engine speeds. I replaced one O2 sensor at 80K miles. May 02, 2018 · The O2 doesn't come into play at first startup. Replaced air filter and maf sensor. I have done tune up, replaced the cam shaft sensor, oxygen sensor, the intake and exhaust valves, main battery, auxiliary battery, and had the dealership reset and upgrade the computer. Left side has maybe 2-3 misfires total. I picked up one for a '90 Mustang LX the other day for $30. 4 Jul 2016 O2 sensors are not something you replace for the heck of it. I'm going to have to say it could be a ign problem. The ECU should be able to learn parameters from new sensors, like MAF, over time. May 25, 2020 · To clean the sensor surface, you should only use a Mass Air Flow Sensor cleaner (MAF cleaner) or electrical contact cleaner. As soon as I replaced the O2 sensors (just a tune-up, no check engine lights or problems), I got a check engine light for P0132 which is high voltage to the heater circuit in the upstream O2 sensor (bank 1 sensor 1). I changed the cables and although it helped out, the problem still persisted. I use Bosch sensors to replace Thundermax units. Just replaced a oxygen sensor car now runs rough 1 Answer. My check engine light comes on at 3000 RPMs and I don’t know why I cannot get any mechanic that can tell me what the problem is I’ve done change my mass airflow sensor all my coils my plugs my plug wires my knock sensors my cam sensor a couple more sensors I don’t even know the name of right now and it’s still at 3000 RPMs the check engine light comes on As I also stated, the power loss my 96 was experiencing at the top of 2nd gear went away after I replaced the front O2 sensor. O2 sensors do degrade over time and only set a check engine light and code when they are totally gone. now it runs fine. Usually, a failing O2 sensor will cause the computer to store a trouble code, but you still need to confirm that your oxygen sensor needs replacement. The PCM's only clue to rich or lean mixtures is through the O2 sensors. Any suggestions would be great. The code never went away, and I didn't have the OBD code reader to follow My 2000 Sentra is showing a PO171 "System too lean - bank 1" code and the shop I took it to is telling me to replace the Mass Air Flow sensor but I don't think that's the problem. I replaced the fuel pressure regular; it was shot. engine light came on. Very simple. The result is increased emissions and fuel  29 Jan 2011 Guidelines for replacing the oxygen sensors in your car, courtesy Bosch. 8 L V6" badge/emblem on the top of the intake manifold was Re: disable o2 sensor on zx14r: You may find the fuel consumption will change if you disable and remove the stock O2 sensor, but the change should be pretty minimal and offset by a better running bike. 8 14. That was just to make some room to take the O2 sensor off. Car will drop below 1000 rpms and then rev back up to over 1500 like it wants to shut off. Codes P0300 and P0301 Engine Misfire Cylinder #1 - Failed ignition coil. If it does not solve it, put the old O2 back on and save the new one The other way is to unplug your O2 sensor and see how the truck runs in open loop. 5. Plugged it in and all was well for just under 10K miles. near my work and had them diagnose on Jan. After about an hour of cruising around just fine it started sputtering under WOT and finally died to the point i thought I had run it out of Mar 28, 2008 · Worse mileage, worse performance with a new one vs. You'd push the start button and the computer expects the motor to be spinning - except it wasn't because the starter isn't spinning - so it goes "oh noes! sensor dead!" You don't even need AutoZone because it throws the code right on 3. The next week the lights came on again. Try disconnecting the O2 sensor. Jan 20, 2019 · Over time, the oxygen sensor (O2s) wears out or may become soiled with carbon buildup, causing the engine to idle rough. The two codes were bank 2 O2 sensor voltage high and bank 2 heater control circuit low. Will make you much easier to understand. The rear O2 sensor only tells you that the cat is working or not working. In the Haynes manual it says to rev your engine to 2000 rpms and the output So if an engine runs slightly rich, the ECU can make a slight adjustment to bring it back to normal. Has anyone had these problems before, I was thinking about taking off the cat and o2's while running the stuff through my vac lines. Open to suggestions. BTW, it's easy to change out the MAF sensor but you will need a special Toax screwdriver. Apr 27, 2013 · The lube will destroy the old sensor if it gets in the shell though, so use sparingly or commilt to a new one. The dealership kept the car for a few days but later reported that they could not duplicate the problem. My gf has a 08 Mazda 3 2. It ensures the engine is fuel efficient and does not waste fuel by combining too much or not enough oxygen. - Adjusted Idle up a hair. The Bank 1 sensor 2. Jul 23, 2020 · The good news is that it won’t cost you an arm and a leg to replace a bad knock sensor. Replaced icm, computer, disputer, coils, plugs , wires, tps, maf, egr , fuel pressure regulator,. which I’m told is running too lean I replaces the exhaust manifold w/caty convertor. May 01, 2010 · It would cause low O2 readings because the air/fuel mixture didnt burn, therefore there is still Air and Fuel going across the O2 sensor which makes the O2 sensor read a lean condition. now im getting the P1147 code which i believe is manufacturer specific to Nissan for a bad lower O2 sensor. It boggs down on hard acceleration in all gears. As they age, you'll typically see fuel mileage and power decrease. I have my O2 sensor replaced twice (every 90K miles) in each case there was a very noticeable improvement in performance. Replaced all 4 O2 sensors. Aug 06, 2004 · Worse part will most likely be getting under the car or finding the sensor. I was investigating my o2 sensor but I didnt know how to really diagnose it. I am convinced the sensor is dirty or faulty. While poking around under the hood the other night, I noticed the "3. Mar 14, 2018 · Gary franklin July 11, 2019. In either situation, no check engine light has come on, flashed, etc. Plug in the sensor connector and clip wire-piercing probes on the center and left wire. 50 on ebay, it is a generic sensor you can get off most toyotas at the junkyard for cheap. it may have a leak and the O2 sensor is reading a bad oxygen level and throwing the PCM into I replaced the camshaft position sensor. Helped a little. 0 AT. If you got this far with it, the O2 sensor is probably good, if not, it may not be bad. So heads up for those running Fatduc not to run it too rich :-) Engine warning light. Therefore a failure of the compressor will Sensor 1 = Fuel-Air Trim Sensor Sensor 2 = O2/Catalyst Efficiency Sensor The 2UZFE has 2 upstream and 2 downstream units. Thanks again. It pulls smoothly and strongly with or without the WOT pressed. The only things left I can guess is the intake temp-the MAP, the crank angle/crank speed. The O2 sensors have been monitored using a scan tool and no signs of issue have been noted. (note after replacing the o2 sensor closet est to the exhaust manifold, this code has not returned) tech wrote on the paper work o2 sensor (air fuel ratio sensor) no activity detected. So I had a CEL w/P1167 code on my 02 Accord 4-cyl 190,000 miles. This seems more as a crank or cam sensor going bad. The garage swapped the o2 sensor -pre cat. Googled it an several other Durango owners have indicated that they have no relay in this slot either. Nov 19, 2015 · Hi everyone. It runs OK when first started, but get worse as it warms up. If you step away from Bosch, you can prolly buy that sensor for about $35 from Centaurus. Now it runs worse it chugs and sputters. Nov 04, 2011 · If your Check Engine light is constantly trying to get your attention, one possible problem could be a bad O2 sensor. I live in a state and county that expects people to have emissions tested. I have the P0420 code. Took my car to an exhaust place, they said it was my O2 sensor or my catalytic converter. I double checked the O2 sensor connection and tried again. Mar 06, 2018 · Cruz P Matias April 8, 2018. I had a similar failure on my 2002 S10, 2. I had an O2 sensor replaced by the dealership when I bought it, actually. Somewhere I read that NTK sensors worked well, so bought a 25198 sensor and installed. Seems worse when the AC kicks on. A couple of weeks ago the OEM downstream sensor completely failed. Runs worse. You could disconnect the first o2 sensor and run it for a short while. Identifying which O2 sensor has to be replaced also can be confusing. It runs a little better, but it is still missing. The way I've seen the O2 sensor fail is that it struggles or fails to output a voltage above 600-700 mV. Big mistake. Anyone here have a huge reason NOT to use a generic O2 sensor such as this one: Apr 21, 2011 · The O2 sensor is ignored when the car is cold (open-loop mode) so the car runs fine. L. If the cat fails, the O2 sensor will report P0420 or P0430 depending on which bank is affected. A failed O2 sensor is one of the reasons your check engine light may go on. Aug 16, 2009 · Changed plugs, wires, cap, button in the last 5-10k miles, since it's gotten worse, I've verified coil was in spec, MAP sensor checks good, FI's all meter within 4-5 ohms of each other, replaced all vacuum lines from intake to EGR, MAP, PCV with new valve (old one had split in two) and some misc others. PCV, map pressure sensor, IACV and MAF sensors have all been cleaned. ++ on replacing the O2 sensor before dumping 1K on a new catalytic converter. I. Except it was a dead starter relay. Mar 18, 2008 · I have a 1996 Subaru legacy Outback, 2. 4) F3ZF-12A650-DA (later replaced by DB), catch code A3M1, derived from 1993 manual trans Mustang. My brother suggested that it could also be the gas cap that caused On shop replaced Map, rear O2 sensor, and I put in new plugs, wires, rotor and cap and fuel filter. For these reasons, and to avoid throwing more money into the issue, it is best to have the issue diagnosed professionally, even if you fix the issue yourself. Your pre-cat O2 sensors should be replaced at 100k per Bosch (125k for wideband). GMs with a bad O2 sensor often experience irregular or rough idle. I read this is common for O2 sensor/CEL behavior when going out. Before I replaced the O2 sensor, at times the transmission felt like jerking/slipping from 1-2 or 2-3. Guy had an FJR-1300 throwing the code for a bad crank position sensor. Mar 19, 2009 · When I saw the erratic O2 sensor reading and saw that it happened when the heated O2 came online I decided it was time to replace the O2 and the heated O2 sensors. The way your car has been running (and having DTC's), your oxygen sensor is being ignored by the engine computer. There is an ACT (Air Charge Temp) sensor on the intake, you can test/clean that. It will stay in open loop mode with the ECU not referring to the o2 sensors. Jul 09, 2009 · I already replaced my MAP sensor. I'm considering running a fresh tank of gas, installing new spark plugs along with the replacement o2 sensor and giving the test another try. I also checked some sensors like MAP sensor, O2 sensors, Throttle Body Position sensor, and Crank Shaft Position sensor but no fix. Let the sensor surface dry completely before refitting it to the vehicle. Replaced o2 sensor & fixed the problem. Scan tool says the oxygen sensor was reporting that bank 1 was reading a lean condition (riiight), so I am guessing it is shot. Help is appreciated. Helped start problem. An O2 sensor rarely fails outright. I like your thinking, I would take TheHunter990's suggestions. Once you've replaced your  When you first start your car it is running in “open loop”, most sensor data is ignored So first start up and drive the car should drive fine, if removing the O2 sensor dirty oil and replace it with a cat-back system headers synthetic oil probably and one You need your O2 sensor, if you're getting worse gas mileage then you  6 Oct 2016 GO TO MY WEBSITE AND BMW FORUM !!! https://www. I read a on a few forums that driving it around for 15-30mins to let the ECU readjust the sensor to perform accordingly. The car runs ok, although I notice a vibration while sitting at red lights in drive, that wasn't there before. One or two wire unheated oxygen sensors should be inspected or replaced every 30,000 miles. Apr 13, 2006 · Anyone seen an O2 fail in under 10K miles? When i got my 960 it drove like crap and ran an O2 sensor code (2-1-2) I called FCP Groton and ordered my direct OEM replacement Bosch O2 sensor. If you replaced the O2 sensor and it didn't help, and didn't feel like replacing more stuff then you could always build an adjustable MAP sensor. One key reason the light goes on is due to an oxygen sensor malfunction. Ok, you've gotten lots of answers but only one right. So it appears I have burned up another O2 sensor in only about 130 miles. Everything when fine. Is the check engine light on? I assume you have a 3. But before you run out and buy a new one check to make sure all the wires to o2 are good, you have 12 volts on the heater wire and the o2 ground is good. Truck has new plugs, plug wires, distributor, egr valve, O2 sensor. Cleaned throttle body (both vacuum lines there had leaks and fixed with no difference) and maf sensor. My 1998 Bmw runs on 92 deg C thermostat and it is nice and warm in winter. 11/09/2012 - Replaced bank 2 position 2 oxygen (O2) sensor - passenger side rear sensor with Bosch 15510 sensor. 1997-2001 Jeep Cherokee XJ. Does this mean O2 sensors should be replaced for preventive maintenance or as part of a high mileage major tune-up? Jul 12, 2011 · O2 sensor replaced and now truck runs bad. I'm hoping it's not the head, but the O2 sensor or something. Immediately got a P0037 (heater control circuit low) and a P0138 (O2 circuit high voltage). This is similar to the above in that it stems from poor spark timing. Hi, I have a 1987 Vette. Sep 06, 2016 · No Diagnostic trouble codes recorded. No trouble codes reported. Dec 13, 2011 · The usual range of voltages produced by a narrowband O2 sensor on a BMW motorcycle is 100-950 mV. Dec 21, 2018 · Bought my uncle a 99 Lexus RX300 AWD and the car was getting a lean code P0171 plus a code for bank 1 sensor 1. This needs a throttle body cleaning. I thought only 04's had length issues, I've got an 03. Dec 12, 2010 · -Replaced crank sensor-Crank shim added and made the problem worse-Plugs,wires, distributor cap and rotor check out ok-IAC was cleaned-TPS replaced-o2's replaced Getting a code for O2 sensor high voltage B1,S1. Oct 19, 2013 · I'm showing my car some TLC today and sea foam is on the agenda, my concern is that it could clog my converter or foul out my o2 sensors. When checking it looked gray so I took them out to switch, problem is they both look gray? 2014 Ultra My 07 Malibu classic was just recently bought about a month n a half ago off a used car lot but is a salvaged title. Getting a code for O2 sensor high voltage B1,S1. Last thing replaced o2 sensor fixed the total thing. The oxygen sensor is a key sensor that can hurt fuel economy if it is getting old or has failed. The consequence of this is that the AF-XIED output stays below 200 mV, which the Motronic interprets as a faulty O2 sensor. Now the vehicle runs rough, like it has a slight miss in the engine maybe a small lack of fuel. I cleared the alarm with my OBD2. 22 Jan 2020 Even worse, you need to have an annual inspection soon, and your Some mechanics will tell you to try replacing the oxygen sensors first,  Replacing worn or failed oxygen sensors is the best way to protect expensive When the vehicle is operating in open-loop mode, the engine will run rich, that check engine light is the worst thing you can do for your three-way catalyst(s). It seems like the idle becomes worse the longer I let it sit, although, it doesn't usually start having problems until I've idled for more than 2 or 3 minutes. That one you listed happens to fit a Caddy, so its about $95. Oxygen sensor failure can often be traced to one of three common factors: Age and high mileage, an internal contaminant (poisoning) or an electrical issue. When i get in the car and start it when cold it runs perfect for about 4-5 minutes. Although the 2. How can I test my oxygen sensor? You can test the O2 sensor on a vehicle by first identifying the signal wire on the sensor. Put a gauge on the vehicle and it read 20 psi it should have been 37-41. A/F sensors I believe work on 5v supplied by the computer and O2 sensors make there own voltage up to 1 volt. replaced o2 sensor runs worse

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