I can't seem to find what forum this needs to go in, so moderators please move if it's incorrect.
First off, Hi everyone. My name is Justin, and I am the owner (well, my wife owns) a 2005 chevy cobalt LS. It's been a really nice car the time we've had it, although it's had a few problems we've gotten fixed.
Anyways, I have a question. For the longest time, we have had our service engine light on, and when we pulled the code, it pointed to 'cylinder head leaking oil, or front or rear o2 sensor showing wrong value'. I can't exactly remember what the code was, but that was the basic description for it. The car does not run rough at all. It runs like the day we got it, but the light will not go away.
At first, when it first came one, my wife stopped at a stop sign. Light came on. She drove about 15 minutes like that, than it went off. After that it came on again and stayed on. (I remember ONCE it went off and stayed off for about an hour of driving, than came back on).
None of the above mentioned times did the car start acting up or run rough. Any ideas what the problem could be? The o2 sensors are about $100 a piece, so just throwing them at it for no reason doesn't sound sensible.
We are looking to trade it in for a newer car soon, and don't want that to be a negative factor in trade-in value. Please help!