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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> Outside Air Temperature Display Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify no other DTCs are set.
    • If any other DTCs are set

      Diagnose other DTCs first.

    • Go to next step: If no other DTCs are set
  3. Verify DTC P0072, P0073, P0074 is not set.
    • If DTC P0072, P0073, P0074 is set

      Refer to: Circuit/System Testing

    • Go to next step: If DTC P0072, P0073, P0074 is not set
  4. Verify the scan tool parameter: Ambient Air Temperature =-40 to 88°C (-40 to 190°F) and changes
    • If not between -40 and 88°C (-40 and 190°F) or does not change 

      Refer to: Circuit/System Testing

    • Go to next step: If between -40 and 88°C (-40 and 190°F) and changes 
  5. Verify HVAC system operates properly. Refer to: Symptoms - HVAC Systems - Automatic
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