P2340
Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold
P2340 is an OBD-II diagnostic trouble code meaning: Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold. Common causes: poor quality fuel with low octane number, cylinder 5 knock sensor malfunction. Estimated repair cost: $17–67.
Symptoms
- Knocking or ringing noise from the engine
- Loss of engine power
- Increased fuel consumption
- Unstable idling
- The Check Engine light comes on
Causes
- Poor quality fuel with low octane number
- Cylinder 5 knock sensor malfunction
- Problems with the ignition system (plugs, coils)
- Carbon accumulation in the combustion chamber
- Mechanical engine problems (wear of bearings, balancing shafts)
How to Fix
- Check fuel quality and use additives if necessary
- Diagnose and, if necessary, replace the knock sensor
- Check the condition of the spark plugs and coils
- Clean the combustion chamber from carbon deposits
- Carry out computer diagnostics of the ignition timing
Related codes
Error P2340 by Vehicle Brand
FAQ
What does the P2340 code mean?
P2340 is an OBD-II diagnostic trouble code that indicates: Cylinder 5 Above Knock/Combustion Vibration Sensor Threshold
What causes a P2340 error code?
The most common causes of P2340 include: Poor quality fuel with low octane number; Cylinder 5 knock sensor malfunction; Problems with the ignition system (plugs, coils); Carbon accumulation in the combustion chamber.
How do I fix a P2340 diagnostic trouble code?
To fix P2340: Check fuel quality and use additives if necessary. Diagnose and, if necessary, replace the knock sensor. Check the condition of the spark plugs and coils. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2340?
Limited driving only, diagnose soon
How much does it cost to fix P2340?
The estimated repair cost for P2340 is $17–67. Actual cost depends on your vehicle, location, and labor rates.
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