Our experts are at your service — whenever and wherever you may be. O2 Sensor Replacement- Goodbye Check Engine Light: I bought a 98 Ford ranger XLT several months ago and have been working through it fixing issues whenever time permits. I am trained in the financial planning process, with an emphasis in life insurance and annuity contracts. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle's computer. After a quick and easy fix, there were no issues or codes. Disconnect the positive battery cable for 20 minutes. Today I decided to the tackle pesky check engine light that has been on since I purchased the vehicle. No, it is not necessary to turn off the battery by replacing the O2 sensors. Turn the ignition to the "On" position but don't crank the engine (it won't start anyway). After you put in the new sensor, disconect the negative battery terminal for a few minutes then reconnect it. By continuing to use this site you consent to the use of cookies on your device as described … You don't need to disconnect the O2 sensors first because it controls the mixture of air fuel. Fuel injector problem. I guess my real question is: do the codes HAVE to be cleared before the new O2 sensors will start working? Engine control lamp clicks and then stops. This will indicate that your ECU has been restored. How do you reset the computer on a 2009 Sprinter after an oil change it is not in the owners manual Dealers want 165.00 just to reset it-? I am a Registered Financial Consultant with 6 years experience in the financial services industry. Oxygen sensor defective. Computer reset after replacing the O2 sensors? Was the code reset after changing the sensor? Locate the fuse for the ECU using the fuse diagram on the underside of the fuse panel cover. 4 Turn ignition key to ON (don't start car) and leave it there for 3 minutes. This will indicate that the ECU has restored. Clicking this will make more experts see the question and we will remind you when it gets answered. The final change was to do what Austin suggested, and was backed up by a FiTech support rep, re-flash the ECU. that will reset your check engine light. Turn on the ignition in the on position but do not turn on the engine (it will not start anyway). Favorite Answer. How to Disable a Cadillac Alarm. The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. Wait five minutes and reinsert the fuse. Turn on the ignition in the on position but do not turn on the engine (it will not start anyway). The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. Everything else is ready. The "Check Engine" light will blink, then shut off. Its also possible that its not a problem with the O2 sensor itself, but the wiring to it. Unplug the wire at the connector and remove O2 sensor. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, "Auto Repair For Dummies"; Deanna Sclar; IDG Books Worldwide; 1999, "How To Repair Your Car: Car-Care Tips, Simple Repairs, Driving & Maintenance Tips, and more..."; Paul Brand; Motorbooks International; 2006. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle's computer. Three weeks ago, I took the van in to replace the O2 sensor. This will indicate that the ECU has been restored. Jump to Latest Follow ... see if the old messed up carb and sensors are able to reset to factory settings to straighten things out. ), it will take some amount of driving before everything is considered "ready." If the code comes back after being cleared, I … I recently change my O2 sensor on my 2000 chevy silverado. Bank 1 sensor 2 is the one on the catalytic converter. I took it in this morning to get inspected and it showed O2 sensor not ready, resulting in a failure. Re: Do I need to Reset ECU after Map sensor replaced? For details on how we use cookies, collect data, & how to manage your consent please see our Cookie Policy & Privacy Policy. Your Dodge Grand Caravan, like all vehicles manufactured after 1996, has an on-board diagnostic system. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. A local tech is on their way to help. This will indicate that your ECU has been restored. The lamp of the check engine will blink and then turn off. How do you reset the computer on a honda rubicon - Answered by a verified Motorcycle Mechanic We use cookies to give you the best possible experience on our website. The lamp of the check engine will blink and then turn off. After resetting changing a sensor, clearing toruble codes, or resetting the ECU (unhook battery, etc. Your car has to work in open loop without 02 which is good. If this is your first visit, be sure to check out the FAQ by clicking the link above. otherwise it will take a few hundred km for the ecu to self-adjust. It is a coincidence that it happened shortly after your oil change unless you were messing with the wiring or something. Its not the first. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. On pins number three and four measure the resistance for the heater circuit. More often than not an O2 sensor code is fixed by replacing the sensor but it could also be a wiring or ECM issue, an exhaust leak, or some other driveability issue that makes the computer think the O2 is bad when it is not. After replacing the throttle body to your engine, if the engine light was on and has a pending code, the code will go away. Idle still not smooth after O2 sensor replacement Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Idle still not smooth after O2 sensor replacement This topic contains 4 replies, has 4 voices, and was last updated by Sal 5 years ago . The amount of driving required depends on the particular model and perhaps the type of driving you do, whether stop-and-go or highway. 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. Having a bit of an issue on my petrol Fiesta. idle problems after changing o2 sensor please help! The only sensor model guaranteed to work with the vehicle’s onboard computer is the same one the ... contact an auto parts store before attempting to change the sensor. Print this page; Share this page × Ad. A dirty or bad MAF sensor must also give a hard motor. after about 90 or so miles, if your check engine light doesn’t come back on, you should be in the clear. Hope it fixes your problems. After that, your ECU should be reset. Voila, the next start began showing AFR data after a few seconds of runtime. Just work rich as hell. First failure occurred on warrantee, second at maybe 100K miles. Ignition misfire-repair. To reset the ECU: 1 Disconnect neg. You can reset it with a code reader or by disconnecting the battery (-) terminal for a few minutes. Reset computer after replaceing o2 sensor. You could also take the old sensor to a ... You may have more than one. Open the fuse panel in the driver-side foot well, under the steering column, by pulling down on it with your fingers. Pull the fuse for the ECU using the fuse pullers in the fuse panel. terminal of battery for about 10 minutes. So I took out my OBD2 scanner and it pointed to the O2 sensor. The onboard computer will detect the problem and turn off the light. Yes the computer has to be reset. So I am considering changing out the oxygen sensor … Was the code reset after changing the sensor? Posted by larry small on Aug 02, 2014. Probable cause(s): If bank one and two codes set together suspect fuel pressure or MAF sensor. You may have to register before you can post: click the register link above to proceed. Wait five minutes and reinsert the fuse. If you notice the engine light is still on after three days, then it is time you tried some of the methods showed above or take it for mechanical repairs. Anonymous. Put the AED performance tune on my car the other night after changing a bad O2 sensor and drove it to work the next day (25 miles each way). You can reset it with a code reader or by disconnecting the battery (-) terminal for a few minutes. If the code was a hard permanent code, then the ECM (computer) would need a hard reset. Discussion in 'Ram ... see if the old messed up carb and sensors are able to reset to factory settings to straighten things out. I've had two O2 sensor failures on my '01 PF, a LONG time apart. We use cookies to enhance your experience. Depending on your emissions rating which you will find under the hood on the label the pin configurations are different. If it is not within spec replace the sensor. Do I just reset the - Mazda 2002 Protege question Sometimes an O2 sensor fails, and you need to replace it. Turn on the ignition in the ignition position, but don't turn on the engine (it won't be carrying in any way). Wait five minutes and insert the fuse again. I'm going to try the battery disconnect when I get home. idle problems after changing o2 sensor please help! I replaced the alternator, that fixed the implicit parasitic draw, but did not affect the O2 sensor issue. Remote Assist is your resource for a virtual diagnosis and repair, In-home service required? Wait five minutes and reinsert the fuse. You should do it. does the computer have to be reset after replacing oxygen sensor? Wait five minutes and enter the fuse again. The simplest way to reset the engine light is to drive the car with the light on for several miles. After all the horrible experiences I have had at ford A.S.C over the years, I chose to replace it myself. I'd replace the dead one now and wait for the other to fail.The only savings to replacing them both now is jacking it up and putting it onstands (yawn). 8 years ago. There are some self adaptive parameters that will be affected by a MAP sensor. Comment; Flag; More. To reset the Check Engine light you can try this. The computer will reset itself after a few driving cycles. I had hopes that it would sort itself out after replacing them, but actually runs worse. If you have to drive 10 minutes before the Check Engine light comes on … The computer has recognized a rich or lean condition on one engine bank only. Is it the correct o2 sensor for the vehicle? It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. Its also possible that its not a problem with the O2 sensor itself, but the wiring to it. I duly checked the sensor with a multimeter and indeed the heater was gone. This will indicate that your ECU has been reset. 01-08-2008, 09:01 AM Had to replace my up stream 02 sensor on bank 1 this weekend and I didn't bother to reset the ECU. Just reset your computer after replacing the O2 sensor. The check engine light went out but came back on again. Want Answer 0. Turn on the ignition in the ignition position, but don't turn on the engine (it won't start anyway). Should I reset computer after changing o2 sensor? I have written for Demand Studios since 2009. The control lamp of the flash engine and then stop. This instructables will con… I need to reset my Car computer after I fix the O2 sensor I have a tester that reads the codes. It went into limp mode recently (with a light). Is it mandantory to reset ECU after replacing UPsteam O2 sensor? after replacing bank 1 and 2, I reset the it with the code reader. When one of your Grand Caravan's sensors indicates that a system is not operating properly, ... How to Reset a 2005 Chevrolet Computer. 2 Reconnect battery 3 Open driver's door and leave open (important!) Might have even been the same sensor. Hi there. Question is: do I need to replace it insurance and annuity contracts the type of driving required on... Car has to work in open loop without 02 which is good is: do the codes have register... To self-adjust the computer has recognized a rich or lean condition on one engine bank only codes. Sensors first because it controls the mixture of air fuel number three and four measure the resistance for the circuit! 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