Add Yahoo as a preferred source to see more of our stories on Google. Q: In my vehicle, the check engine light comes on and then goes off and it is now back on. I had a test done at local auto-parts ...

The warning light can return even after an expensive repair. Here’s what your car may be trying to tell you.

A solid check engine light is a "look into this soon" nudge. A blinking one is different.

I had a test done at local auto-parts store that showed a code of PO138. They told me this indicates a problem with the oxygen sensor. I replaced the oxygen sensor and the light never went out. I ...