Awasome 02 Sensor Check Engine Light Sometimes Comes On 2023. Just remember that it could take a couple of trips for the light to turn off. Symptoms to be alert for with a bad oxygen sensor include decreased fuel economy, a rotten egg smell from the exhaust, reduced engine performance, and a failed emission test.

Bad wiring we included this reason as the first one since it is the easiest to solve and troubleshoot. If liquid is exposed, it may trigger your check engine light. One of the most common bad oxygen sensor symptoms is a check engine light on your dashboard.