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 ...

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 ...

Your vehicle's O2 sensor plays a significant role in its performance and if it's faulty, it's not something you should ignore ...