Fan/WPC speed sensor supply too low
â–¶ How to fix
Check the actuator, connectors and wiring. Measure voltage between B6_5 or A6_2 and ground, the voltage shall be 12V.
What you'll see
No driver-visible symptom recorded.
System reaction
The engine cooling capacity will be very low, overheating at high loads is likely.
Diagnostic depth
Detection
Fan/WPC speed sensor supply has been very low
Possible cause
The wires or the connectors to the Fan/WPC have been damaged.