When you bring your car in for service or general maintenance, or even if you do it yourself, chances are you don't even think about the oxygen sensor. You might not even be aware that your vehicle ...

Stricter environmental controls and the requirement to create less pollution has led to far more complex automotive exhaust systems. One component of these systems is the oxygen sensor or Lambda ...

Unscrewing a sensor and replacing it is pretty straightforward. You might need this special socket to clear the wires. Twelve years and more than 100,000 miles have passed under your trusty commuter ...

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 ...

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 ...