The oxygen sensor detects the amount of oxygen present in exhaust gases in relation to the surrounding atmosphere and then sends the signal to the E.C.M. for analysis.
Electrical components such as a sensor are non-returnable parts.
Always refer to a factory service manual when diagnosing engine service problems. You can damage electrical components if the proper procedures are not followed. Be sure you are replacing the correct part. See More Info On Our Blog
What They Do: Measure the amount of oxygen in exhaust and signal computer to adjust air/fuel ratio.
Failure Symptoms: Low voltage output or slow reaction causes poor performance and economy, high emissions.
Maintenance/Service: Perform periodic emissions checks.