Fan Speed Sensor Circuit No Signal
Same as P0526 with no detectable signal at all - sensor not producing pulses despite the fan being commanded on.
Affected components
- Fan speed sensor
Common causes
- High likelihood: Sensor dead or magnet demagnetised
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.