What this code means

The ECM detected a fault in the signal circuit for the cooling fan that serves the control modules. Volvo uses a dedicated fan to cool electronic modules in the engine bay.

Symptoms

• Check Engine Light
• Control modules may overheat
• Possible reduced performance in hot weather
• Other fault codes from overheated modules

Common causes

• Faulty cooling fan motor
• Fan relay failure
• Wiring fault to cooling fan
• Fan control module fault
• Blown fan fuse

Diagnostic steps

1. Check fan operation by applying direct power
2. Test fan relay
3. Check fan fuse
4. Inspect wiring to fan
5. Monitor fan control signal from ECM

Repair notes

Replace the cooling fan or repair the fan circuit wiring.

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