Fan Speed Sensor Circuit
A general circuit fault on the cooling fan tachometer feedback - the ECU loses fan speed information needed to verify cooling capacity and detect a stalled or runaway fan.
Affected components
- Fan speed sensor
Common causes
- High likelihood: Open in sensor or wiring
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.