Fan 3 Overspeed
Cooling fan 3 exceeds the calibrated maximum speed. Indicates load lost (broken fan blade) or supply voltage above nominal.
Affected components
- Cooling fan 3
Common causes
- High likelihood: Fan blade broken or detached
- Medium likelihood: Alternator overvoltage
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.