P2343
Cylinder 8 Above Knock/Combustion Vibration Sensor Threshold
P2343 is an OBD-II diagnostic trouble code meaning: Cylinder 8 Above Knock/Combustion Vibration Sensor Threshold. Common causes: poor fuel quality (low octane number), faulty spark plug in cylinder 8. Estimated repair cost: $6–56.
Symptoms
- Knocking or ringing sound from the engine (especially under load)
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Check Engine light comes on
Causes
- Poor fuel quality (low octane number)
- Faulty spark plug in cylinder 8
- Problems with fuel injectors (clogged or leaking)
- Malfunction of the knock sensor or its wiring
- Incorrect ignition timing
How to Fix
- Check and, if necessary, replace the spark plug in cylinder 8
- Assess the condition of the fuel injector of cylinder 8
- Check the wiring and connections of the knock sensor
- Use fuel with the recommended octane rating
- Read engine parameters using an OBD-II scanner
Related codes
Error P2343 by Vehicle Brand
FAQ
What does the P2343 code mean?
P2343 is an OBD-II diagnostic trouble code that indicates: Cylinder 8 Above Knock/Combustion Vibration Sensor Threshold
What causes a P2343 error code?
The most common causes of P2343 include: Poor fuel quality (low octane number); Faulty spark plug in cylinder 8; Problems with fuel injectors (clogged or leaking); Malfunction of the knock sensor or its wiring.
How do I fix a P2343 diagnostic trouble code?
To fix P2343: Check and, if necessary, replace the spark plug in cylinder 8. Assess the condition of the fuel injector of cylinder 8. Check the wiring and connections of the knock sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2343?
Limited driving only, diagnose soon
How much does it cost to fix P2343?
The estimated repair cost for P2343 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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