B2456 Code – Auxiliary Heater Coolant Sensor Circuit Short to Ground

What are the Possible Causes of the Code B2456?
  • Faulty Auxiliary Heater Coolant Sensor
  • Auxiliary Heater Coolant Sensor harness is open or shorted
  • Auxiliary Heater Coolant 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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