P0529moderate severityPowertrain
Fan Speed Sensor Circuit Intermittent
on 2005-2011 Audi A6 4.2L V8 · AWD
What this code means
The cooling fan speed sensor signal is dropping out intermittently. The problem may come and go, often due to loose connections.
Symptoms
- Occasional overheating
- Intermittent check engine light
- Fan cycles unexpectedly
Common causes
- Loose connector or wiring
- Intermittent sensor fault
- Corroded terminals
- Faulty control module
Diagnostic steps
- Retrieve stored codes
- Wiggle-test wiring and connectors
- Monitor signal while driving
- Repair faulty connections
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