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How do you reset an o2 sencer on a 02 yukon - Yukon XL GMC Cars & Trucks

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Hi! Just try this old trick that usually works. Just disconnect the battery connectors and leave for atleast 30mins. Reconnect the battery connectors again then this should reset the system. HOpe this helps and have a good one!

Posted on Apr 28, 2010

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I took my 2000 pontiac montana to auto zone on saturday and they ran there little test on it cause the light was on it came up with both o2 sencers were bad but i have changed the back one twice last month...


When you had one go bad, it fixed the problem for a short while. Now both they say are bad. 02 sensors last a long time if the engine has regular maintenance. Most likely your catalytic converter is bad. This will cause, at first the rear 02 to show bad readings setting a code. And as the converter progresses to get worse, it will make both 02 sensors give bad readings, thus setting off the codes.

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After changing an o2 sencer on a 2002 yukon how do you reset the computer


YOU NEED A SCANNER ERASE CODE ON THE OBD 2 COMPUTER CONTROL CARS. THE CARS WITH OBD 1 COMPUTERS YOU COULD REMOVE THE NEGATIVE BATTERY CABLE FOR A MINUTE TO ERASE CODE.

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Yes they are i would try and change the o2 sencer first.Because it says your system is running to lean or to rich. And that 02 sencer is the problem

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1 Answer

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Its on your exhaust. There can be 1 - 5. Your van probably only has two. There is an upstream one (Before the catalytic converter) and a downstream one (After the catalytic converter)

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that can be a 02 i also had this problem turned out to need a good tune up another time it was the cap

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