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 ...

In the world of automotive tuning, knowledge is horsepower. Gauges, loggers, and sensors galore provide the data to advance performance, solve problems, and prevent expensive engines from experiencing ...

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 store that showed a code of PO138. They told me this indicates a ...

Modern vehicles are pretty complicated pieces of tech. Apart from emissions and other vital functions, the engine control system relies heavily on several sensors to regulate performance. That is ...

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 ...