P1331
Cylinder 7 Knock Control Limit Attained
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)
Symptoms
- Metallic knocking noise from the engine (especially under load)
- Engine power drop
- Increased fuel consumption
- Engine vibration
- Check Engine Light
Causes
- Low quality fuel
- Faulty spark plug in cylinder 7
- Problems with cylinder 7 injector
- Low compression in cylinder 7
- Engine overheating
How to Fix
- Refueling with high-quality fuel with the recommended octane number
- Checking and replacing the spark plug in cylinder 7
- Diagnostics and cleaning of the fuel injector of cylinder 7
- Checking compression in cylinder 7
- Engine cooling system diagnostics