P1086 OBD Code Definition:
P1086 Exhaust Bank 4- Mixture Adaption Range 2 Lower Lean Limit Not Reached
P1086 OBD Code Description:
Possible causes
– Faulty Oxygen Sensor
– Oxygen Sensor harness is open or shorted
– Oxygen Sensor circuit poor electrical connection
– Oxygen Sensor harness is open or shorted
– Oxygen Sensor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)