P2337high severityPowertrain
Cylinder 3 Above Knock Threshold
on 2013 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
The engine controller detected excessive knock (detonation) in cylinder 3 that exceeded the allowable threshold. This can be caused by ignition timing, fuel quality, or carbon buildup issues.
Symptoms
- Engine pinging or knocking noise
- Reduced power
- Check engine light on
Common causes
- Low octane or poor quality fuel
- Carbon buildup in combustion chamber
- Faulty knock sensor
- Overheating engine
Diagnostic steps
- Check for stored trouble codes and freeze frame data
- Verify fuel quality and octane rating
- Inspect knock sensor and wiring
- Check for carbon deposits and cooling system operation
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1