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