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

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Posted on Apr 28, 2010

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What is the drive cycle for a 2002 Yukon XL 1500

I don't understand "drive cycle". You can clear the codes by unhooking the battery for 5 minutes then repowering.

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O2 sencor

What kind of vehicle, and what is the actual code ?

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Location of upper o2 sencer

In the inlet to the exhaust converter
if not,in pipe before it

All you have to do is look under the car
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Afer change o2 sencer check engine light still on in escort ford 2000

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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

Apr 15, 2010 | 1997 Mercury Mystique

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I have a 2003 gmc yukon 5.3 the engine idles rough sometimes the idle will get so low the engine will shut off.(the engine runs good while driving) hooked to scaner po101 maf/vaf (dont know what vaf is),...

you have a vacume leak somewhere.check all of your vacume hoses for leaks.Injector seals can cause this too.Also intake gaskets could be leaking.Running to lean usually means the car is getting to much air coming in.To check leaks spray brake cleaner around the hoses and the bottom of your intake if the rpms change then you found a leak.

Feb 21, 2010 | 2003 GMC Yukon XL

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Girlfriend's 2002 Yukon will crank but then occasionally RPM's will drop and it will almost die. Replaced O2 sensors but ... still occurring?

Look at the mass air sensor next to the air filter, check to make sure the clamps are tightend and it is properly sealed. Quick oil change places ar famous for not putting it all back together properly after checking the air cleaner.

Feb 03, 2010 | 2002 GMC Yukon Denali

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I have a check engine light on. I changed both O2 sencers and the knock sencer and the check engine light still comes on. Now I have a 121 code on my reader.

check engine light is not a big deal unless it's flashing.
A knock sensor is never bad and if it was, it's no big deal either. Just $600 to replace for nothing.

Go to this site and read files & folders & ask questions and we will fix your concern.

Mar 03, 2009 | 2002 Nissan Quest

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