Faulty Oxygen Sensor
Oxygen Sensor harness is open or shorted
Oxygen Sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Exhaust Bank 4- Mixture Adaption Range 2 Lower Lean Limit Not Reached is the generic description for the P1086 Audi code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1086 Audi OBDII code.