Performing an oxygen sensor (O2 sensor) test is crucial when diagnosing engine performance problems, emissions test failures, or a lit Check Engine light. Testing identifies if the sensor is faulty,...

An illuminated check engine light, poor fuel economy, or rough engine performance often point directly towards a failing oxygen sensor (O2 sensor). Diagnosing O2 sensor issues requires checking for common...

The definitive choice for replacing a faulty oxygen (O2) sensor in your vehicle is the Original Equipment Manufacturer (OEM) part. While aftermarket options exist and may appear cheaper upfront, the...