P1331 AUDI – Cylinder 7 Knock Control Limit Attained

P1331 AUDI Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1331 AUDI Possible Causes

Low fuel level or fuel quality,Mass Air Flow (MAF) Sensor failure,Low fuel pressure,Abnormal engine noise or failed Knock Sensor,Faulty Knock Sensor,Knock Sensor harness is open or shorted,Knock Sensor circuit poor electrical connection

P1331 AUDI Description

The Engine Control Module (ECM) monitors the Knock Sensor. The ECM sets the OBDII code when the Knock Sensor is not to factory specifications.