Code P1331 – Cylinder 7 Knock Control Limit Reached
What are the possible causes of DTC P1331?
NOTE: The listed causes may not be a complete list of all potential problems and there may be other causes.
- Low fuel level or fuel quality
- Mass Air Flow (MAF) sensor failure
- Low fuel pressure
- Abnormal engine noise or faulty knock sensor
- Faulty knock sensor
- Knock sensor harness is open or short-circuited
- Poor electrical connection in the knock sensor circuit
How to repair DTC P1331?
Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of the code?
- Check Engine Light on (or Engine Maintenance Warning Light soon)
What does code P1331 mean?
The Engine Control Module (ECM) monitors the knock sensor. The ECM sets the OBDII code when the knock sensor does not meet factory specifications.