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P0485moderate severityPowertrain

Cooling Fan Power/Ground Circuit

on 2015 Ford F-150 5.0L V8 Coyote · RWD

What this code means

The PCM has detected a fault in the power or ground supply to the cooling fan. Poor power or ground can prevent proper fan operation.

Symptoms

  • Fan not running
  • Engine overheating
  • Intermittent fan operation

Common causes

  • Poor ground connection
  • Damaged power wiring
  • Corroded connectors
  • Faulty fan relay

Diagnostic steps

  1. Scan for stored codes
  2. Check fan power supply voltage
  3. Inspect and clean ground connections
  4. Test wiring continuity

Other Powertrain codes on this vehicle

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