Auxiliary Cooling System Performance
The auxiliary cooling system performance is below calibration. Coolant flow or temperature drop insufficient under load.
Affected components
- Aux cooling pump
- Aux cooling radiator
- Aux cooling fan
Common causes
- High likelihood: Aux pump output degraded
- Medium likelihood: Radiator partially blocked
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
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.