The Oxygen (O2) sensor is arguably the most critical electronic component for your engine’s efficiency. Often referred to as ...

When the check-engine light snaps on, it is not a suggestion, it is your car’s way of saying something in the powertrain or emissions system needs attention. I see it as an early warning system that ...

Why Replace A Faulty Oxygen Sensor? A faulty sensor cannot transmit accurate data to the car's computer, causing the engine to run unbalanced. An unbalanced engine either burns fuel with too much or ...

Add Yahoo as a preferred source to see more of our stories on Google. The check engine light can turn on for a wide range of reasons. Sure, a loose gas cap is usually the best case scenario, but you ...

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 ...