Don't let failing oxygen sensors compromise your engine's performance. O2 sensors are critical to emissions control on your car, SUV or truck. As the name implies, the O2 sensor (also called an ...

Q: I would like to know when it is necessary to change O2 sensors. I have a Chevy Malibu 2001. Also, if these sensors are to be replaced, why are they so hard to take off? They seems welded to the ...

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 ...

Dear Tom and Ray: This morning I went to my car to find that it had grown what appeared to be "hair" from the tailpipe. It was about 10 inches long and gray, with brown highlights. I had to get to ...