P0529: Fan Speed Sensor Circuit Intermittent
What to do
Driveable. Keep an eye on temperature in traffic until it is resolved.
What this code means
The fan speed signal drops out intermittently. Fan wiring runs across the front of the vehicle where it takes stone chips, road salt and vibration, so an intermittent here is usually mechanical damage to the harness rather than a failing sensor.
Likely causes
Start here
- Road damage to underfloor wiring · moderate
- Corroded or loose connector · easy
- Intermittent open in sensor wiring · moderate
Less common
- Seized or stiff fan bearings · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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