Possible causes
– Faulty Front Oxygen Sensor
– Front Oxygen Sensor harness is open or shorted
– Front Oxygen Sensor circuit poor electrical connection
– Faulty Engine Control Module (ECM)
– Front Oxygen Sensor harness is open or shorted
– Front Oxygen Sensor circuit poor electrical connection
– Faulty Engine Control Module (ECM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)