Hybrid/EV Battery Pack Air Flow System Insufficient Air Flow
The BMS detects that air flow through the HV battery pack is below the calibrated minimum. Cooling effectiveness reduced.
Affected components
- Hv battery pack air flow system
- Hv battery cooling fans
Common causes
- High likelihood: Air filter clogged
- Medium likelihood: Cooling fan underspeed
- 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.