P25AD

Piston Cooling Oil Control Circuit Stuck On

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Check Engine light comes on
Increased oil consumption
Reduced engine power
Unusual noises from the engine
Engine overheating

Causes

Piston cooling valve jammed
Open or short circuit in control circuit
Solenoid valve malfunction
Problems with the engine control unit
Contamination of oil or oil passages

How to Fix

Check the condition of the oil and oil filter
Diagnose the control circuit for opens and short circuits
Check the operation of the piston cooling valve
If necessary, replace the valve or its components
Reset the fault code and check if it returns

Related codes

P25AE P25AF P25B0