Quote:
Originally Posted by Smileybug
Whenever you get a CEL you should get the car scanned, get the actual code, and look it up, either online, the Ross-Tech wiki or here. O2 sensors can fail and throw a CEL. They can also be intermittent and not throw the CEL all the time. I had one dying for awhile. Took months before the CEL came on. You shouldn't be just saying "I think it was that...".
If you have access to a VAG-COM, you can check things like your O2 sensors to make sure they are functioning before you go and replace them. Thats how I figured out which of my sensors was bad, and just how dead it was.
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The bank one sensor that came up was the one I already had replaced in June. I think it came on after I gave him some 94 octane gas on the gtg trip. as soon as I swittched back to regular, he was fine.