Hybrid/EV Electronics Cooling System Performance
The hybrid control module detects that the power electronics cooling system does not maintain target temperatures under load. Coolant flow, radiator fouling, or pump output reduced.
Affected components
- Hybrid electronics coolant pump a
- Hybrid electronics radiator
- Power electronics coolant loop
Common causes
- High likelihood: Radiator fins fouled - reduced heat rejection
- Medium likelihood: Coolant aged - reduced heat capacity
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.