Why Replace A Faulty Oxygen Sensor? A faulty sensor cannot transmit accurate data to the car's computer, causing the engine to run unbalanced. An unbalanced engine either burns fuel with too much or ...

I live in New Jersey, one of the states that mandates inspection for all vehicles newer than 1995. My daily driver, a Jeep Cherokee, happens to be a 1996 model year with an OBD-II sensor, meaning I ...

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 ...

Viewer-submitted questions for The Car Doctor: Q: During the state inspection of my 2019 Nissan Rogue, the “EVAP” and oxygen sensor came back as not ready. I changed the battery back in August and ...

Add Yahoo as a preferred source to see more of our stories on Google. Let's begin with the basics here: An automotive oxygen sensor is part of the exhaust system and does what its name implies, ...

While relatively minor, check engine light repairs can be costly if neglected, leading to as much as 40 percent lower fuel efficiency. Metro News Service photo While relatively minor, check engine ...

Your oxygen (O2) sensors are small but mighty — they help your engine run efficiently, cut emissions, and prevent costly damage. With the right OBD-II scanner and a bit of know-how, you can decode ...

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 ...