OBD-II diagnostic device BlueDriver interprets engine error codes to suggest what might need fixing, and lets you know if your car is ready for a smog check. Wayne ...

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 ...

We've all experienced a check engine light coming on, knowing that unless it's taken care of immediately, it'll be a nagging long-term problem in the back of our minds. It's one of the most important ...

While your car can’t talk, it communicates with you using chimes, icons, and messages. One icon that you should never ignore is the check engine light. It turns on when the car’s onboard computer ...