Piston Cooling Oil Pressure Too Low
With the piston-cooling jets commanded on, the dedicated oil-pressure sensor in that gallery reads below the safe threshold. Insufficient flow to the jets means real piston cooling is not happening — the ECM warns the driver and may reduce torque to protect the pistons.
Affected components
- Oil pump
- Oil gallery
- Piston cooling solenoid
Common causes
- High likelihood: Low engine oil level
- Medium likelihood: Sludge-clogged oil gallery
- Low likelihood: Worn oil pump
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.