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C2303 Code – Short In Power Source Relay Circuit

What are the Possible Causes of the Code C2303?
  • Faulty Transmission Control ECU Assembly
  • Transmission Control ECU harness is open or shorted
  • Transmission Control ECU 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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