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Air Conditioner Error with P110F Code Repair for BMW F15

THE BMW F15 air conditioner can not work, and the dashboard shows a temperature of 50+℃, a high frequency of non-cooling working.

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Trouble Code:
P110F: Ambient Air Temperature Sensor Faulty CAN Signal

 Possible Causes:

  • Faulty Ambient Air Temperature Sensor
  • The Ambient Air Temperature Sensor harness is open or shorted
  • The Ambient Air Temperature Sensor circuit poor electrical connection

Diagnostics and analysis:

  1. Use the multimeter to measure the related wire diagram, work!
  2. Disconnect the dashboard connector to measure resistance 3.5K, it is normal
  3. Both 1 and 2 measurements indicate the dashboard is damaged and can not work well


  1. Remove the dashboard, and check the PCB
  2. There are two places corroded by water
  3. Resolder the places that corroded
  4. Solved!
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