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Vechicle showing code p0481-p0480 how to repair please
Vehicle: 2005-Chevy avalanche 1500

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Hi there,

These codes indicate power supply issues to the cooling fan relays. The relays themselves could be the problem or the wiring to the relays. This requires diagnosing the electrical connections and the wiring from the PCM to the fan relays. There isn't any specific item that causes the code that we can tell you to replace. It must be diagnosed.

  • DTC P0480 Cooling Fan Relay 1 Control Circuit
  • DTC P0481 Cooling Fan Relay 2 Control Circuit

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