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 ...

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.

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 ...

As snow, ice, or salt grime gathers on cars in winter, many of the sensors that are key to the operation of advanced safety systems can become blocked and shut down—right when you may need them most.