U3004 – Accessory Power Relay

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What are the Possible Causes of the Code U3004?
  • Faulty Accessory Power Relay
    • Accessory Power Relay harness is open or shorted
  • Accessory Power Relay circuit poor electrical connection

  • Need help with this OBD II code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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