If you build engines, tune cars, or even just like mashing your foot on the throttle with conviction, you’ve probably heard ...

How many oxygen sensors does a typical car have, and what factors determine this number? Additionally, how do their placements affect engine performance and emissions control? Thomas Hello Thomas, the ...

Can you remove an O2 sensor with a standard wrench? Learn when you need a special socket, what's in a kit, and how thread ...

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 ...

As the name suggests, oxygen sensors in a car’s exhaust system sniff for oxygen, the presence of which indicates incomplete combustion and unchecked pollution. This can trigger the check engine light.

QUESTION: I own a 1999 Buick Century. The indicator that shows gear position does not light up, and at night I cannot see what gear I am in. Is this an expensive repair and worth getting fixed? ANSWER ...