Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic
The BMS detects a circuit intermittent/erratic fault on voltage sense channel I of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Affected components
- Hv battery voltage sense i
- Wiring harness
- Bms
Common causes
- High likelihood: Sense 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
Related codes
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.