Fan Overspeed
Fan Overspeed: the control module has detected this fault condition.
Affected components
- Cooling fan
- Fan relay
- Fan speed sensor
Common causes
- High likelihood: Fan relay welded closed - fan runs uncontrolled
- Medium likelihood: PWM line shorted to supply
- Low likelihood: Tachometer feedback miscalibrated
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.