Hybrid/EV Battery Coolant Leak Detected
The hybrid control module detects a coolant leak in the HV battery thermal loop. Coolant level dropping or leak sensor triggered.
Affected components
- Hybrid battery coolant loop
- Hybrid battery coolant level sensor
Common causes
- High likelihood: Coolant fitting loose or cracked
- Medium likelihood: Coolant hose split
- Low likelihood: Pack cell imbalance approaching service threshold
Possible symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
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.