If you want to know more than one thing, you need more than one sensor. In fact, many engines today have not just two oxygen sensors, but four.

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 ...

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, ...