Charge Air Cooler Cooling Fan Stuck On
CAC cooling fan runs continuously regardless of commanded state.
Affected components
- Cac cooling fan
- Fan relay
Common causes
- High likelihood: Fan relay stuck closed
- Low likelihood: Carbon or debris buildup preventing free movement
- Low likelihood: Component wear with age - mechanical play
Diagnostic notes
- The malfunction indicator lamp may illuminate
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.