Would changing the O2 sensor when my check engine light comes on resolve the problem?
Could that be a main issue the light is on?
Could that be a main issue the light is on?
STEVEN F
Favorite Answer
There are HUNDREDS of things that can trigger the check engine light.
Step ONE is having the trouble code read. That tells you were to start looking for the problem.
The easiest issue to fix is not properly securing the gas cap. There are also at least a dozen different sensors that could be the culprit.
Again: Have the code(s) read. Don't just throw parts at an unidentified issue.
zipper
Only if that is the problem, have it scanned and fine out. It could be a loose contact that needs to be pushed on better or a sensor replacement. Have it checked before you start replacing things!
Phil M
Code readers are about $20 these days.
thebax2006
Don't guess. Go to an auto parts store and get the codes read for free.
Anonymous
You didn't mention which error code you have or any unusual symptoms. If you don't know how to diagnose the problem yourself, don't fire the parts cannon. That could end up being more expensive than getting a shop to diagnose the problem and implementing the correct solution the first time.