Hybrid/EV Battery Coolant Level Sensor Circuit High
The hybrid control module detects a circuit high fault on the high-voltage battery coolant level sensor. Coolant loss in the battery loop cannot be detected reliably.
Affected components
- Hybrid battery coolant level sensor
- Wiring harness
- Bms
Common causes
- High likelihood: Signal wire shorted to B+
- Medium likelihood: Open level sensor
- Low likelihood: Connector pins corroded - high contact resistance
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.