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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> DTC U1973 >> Circuit/System Verification

Circuit/System Verification

    NOTE:

    A dead, disconnected, or replaced battery can cause this DTC to set and odometer to be blank or incorrect. Driving the vehicle will usually correct the odometer mismatch. Drive the vehicle 1 - 2 miles before attempting a repair or diagnosis.

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC U1973, U197E, U197F, U2A90, U2A91 is not set.
    • If the DTC is set 
    1. Perform all necessary programming and setup procedures for the control module: Control module that has set the DTC
    2. Verify the DTC does not set.
      • If the DTC sets - Replace the component: Control module that has set the DTC
      • Go to next step: If the DTC is not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. A fault is not currently present and may be an intermittent condition
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