First of all, clearing codes does not often fix the problem. It may if you didn't secure your gas cap on all the way and it tripped a code for your vapor system. However, you don't know what the problem is until you have have a code scanner plugged into your OBD II service port to see what the trouble code(s) are.
If you make a repair and have the code cleared, keep in mind that you will need to drive the vehicle for a while in order for the IM Ready mode to set in the PCM, otherwise your emission test center will fail the vehicle and tell you the same thing I just did, to go drive it and bring it back in a week. This applies to ALL vehicles equipped since 1996, with OBD II systems.
Let me add, you can go to a Autozone, Checker, Shucks, Kragen, O'Reilly, or NAPA Auto Parts store, tell them your check engine light is on, and they will use their code read to pull up the codes. Find out what those code(s) are, and then report back here and let's see what we can do to further assist you.
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You cant. If you do, when they check the monitors and they have not run, they will not pass you. You will need to get it fixed and then you will need to drive it until all the monitors have run and passed.
Try taking it to autozone or advanceauto parts and let them pull the codes and clear it for you,or take it to one of your local repair shops and ask them to clear it for you it only takes a few minutes and alot of the garages around me will clear codes for free or a very small fee.That is the only way to clear the newer OBDII systems.
You will need a diagnostic tool hooked up to the vehicle and once connection is established you can reset the error light.But if you have to drive it for an inspection the on board computer may pick up the error and it will trigger the light to appear again.
I had light reset, drove for 14 miles engine light came back on. I'm due for an inspection. Any other suggestion, the mechanic said a oxygen sensor would be $150.00.
Will it pass inspection then, or you still have to drive 100 miles to reset it. My 2005 Tahoe has 152,000 miles on it.
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disconnect both battery terminals, connect them together and leave like that for a half hour or so.. might have to do that once or twice. ive only had to do it once... light came off. i was good to go
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