P1331
Cylinder 7 Knock Control Limit Attained
P1331 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Knock Control Limit Attained. Common causes: low quality fuel, faulty spark plug in cylinder 7. Estimated repair cost: $6–56.
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
Related codes
Error P1331 by Vehicle Brand
FAQ
What does the P1331 code mean?
P1331 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Knock Control Limit Attained
What causes a P1331 error code?
The most common causes of P1331 include: Low quality fuel; Faulty spark plug in cylinder 7; Problems with cylinder 7 injector; Low compression in cylinder 7.
How do I fix a P1331 diagnostic trouble code?
To fix P1331: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1331?
Limited driving only, diagnose soon
How much does it cost to fix P1331?
The estimated repair cost for P1331 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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