Last month, we kicked this series off by showing you how to save some money by diagnosing a bad MAP sensor rather than just chucking cash at new parts that may or may not fix a specific problem. This ...

Q: I have a check-engine light that comes on after 50 miles or so and the fault code is 44 — that is bad oxygen sensor. I have changed both sensors, but the check engine light comes on with the same ...

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 ...