Hybrid/EV Battery System Precharge Current Too High
During the HV battery precharge sequence, the inrush current exceeds the calibrated maximum. Indicates short on the DC-link side or insufficient precharge resistance.
Affected components
- Hybrid precharge resistor
- Dc link capacitor
- Bms
Common causes
- High likelihood: Short on DC-link (capacitor or load)
- Medium likelihood: Precharge resistor shorted
- 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.