P0480 – Cooling Fan Control Circuit

Description

The ECM detects a malfunction in the cooling fan control circuit.

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Symptoms

  • Overheating
  • Cooling fan not running
  • AC performance issues
  • Check engine light

Causes

  • Faulty fan relay
  • Wiring issues
  • Bad fan motor
  • ECM fault

Diagnosis

  • Check relay
  • Inspect wiring
  • Test fan motor
  • Monitor fan command

Repair

  • Replace relay
  • Repair wiring
  • Replace fan motor
  • Replace ECM if needed

Related Problems

Related Fault Codes