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 ...

A few weeks ago, I visited a plant in Anderson, S.C., run by Robert Bosch Corporation, which builds oxygen sensors for automotive engine management systems. If you're thinking that a tour of a factory ...

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 ...

As ever, I am fighting a marginally winning battle against my 1991 Mazda MX-5, and this is the story of how I came to install a wideband oxygen sensor in my Japanese thoroughbred. It came about as ...

Your engine needs a steady stream of clean air to function properly, and it's the job of the mass air flow (MAF) sensor to measure and regulate the amount of clean air entering the intake. The engine ...

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 ...