C1774 Code – Coolant Temperature Out of Range

What are the Possible Causes of the Code C1774?
  • Faulty Coolant Temperature Sensor
  • Coolant Temperature Sensor harness is open or shorted
  • Coolant Temperature Sensor 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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