Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Intermittent/Erratic
The HV battery pack cooling fan 1 sense circuit reports a sense circuit intermittent/erratic fault. Fan speed feedback is unreliable.
Affected components
- Hv battery cooling fan 1 sense
- Wiring harness
- Bms
Common causes
- High likelihood: Connector not seated
- Medium likelihood: Noisy ground reference
- Low likelihood: Connector with intermittent contact under vibration
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.