Answer: Kristopher, as you know, lean oxygen sensor and fuel trim codes can be some of the hardest fault codes to diagnose.

Answer: Even though the code is for an O2 (oxygen) sensor, it is pretty obvious the problem isn’t with the sensor itself. There are three possible types of faults which can cause oxygen-sensor ...

Diagnostics An oxygen sensor that’s going bad or has failed altogether won’t always throw a check engine light or trip a diagnostic trouble code. Sometimes if there’s an internal problem ...

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 ...

Hi readers! I hope you have a wonderful day. The next time you hear your car brain tell you it’s getting too much of a good ...

The P0171 "System Too Lean, Bank One" fault code you experienced is only one of the many fault codes a MAF sensor can set when under- or over-reporting the amount of air flowing into the engine.

Oxygen sensors are not among the maintenance items that need to be replaced regularly, so they typically are replaced only when they fail.

A lazy front oxygen sensor is operating fast enough not to set an oxygen sensor code, but not fast enough to see the EGR valve is opening and closing as it should.

The oxygen sensor for automobiles is widely used for the exhaust gas control system by using a three way catalyst and constitutes a very important function part of combustion control system in the ...