P2344

Cylinder 9 Above Knock/Combustion Vibration Sensor Threshold

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Knocking or ringing from the engine
Reduced engine power
Increased fuel consumption
Unstable engine idling
Check engine light comes on

Causes

Using low octane fuel
Knock sensor malfunction
Problems with the ignition system (plugs, coils)
Carbon accumulation in the combustion chamber
Engine overheating

How to Fix

Check and, if necessary, replace the knock sensor
Use fuel with the recommended octane rating
Check and replace spark plugs and coils
Clean the combustion chamber from carbon deposits
Check the engine cooling system

Related codes

P2345 P2343 P0325