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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC P162B: Remote Vehicle Speed Limiting Signal Message Counter Incorrect >> Circuit/System Verification
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Circuit/System Verification

  1. Verify the vehicle is equipped with OnStar® (RPO UE1) and DTC P162B is set
    • If the vehicle is not equipped with OnStar® (RPO UE1) and DTC P162B is set 

      Replace the ECM.

    • If the vehicle is equipped with OnStar® (RPO UE1) and DTC P162B is set 
  2. Perform the Remote Vehicle Speed Limiting Reset procedure with the scan tool.
  3. Verify DTC P162B is not set.
    • If DTC P162B is set 
    1. Reprogram the ECM. Refer to Control Module References .
    2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
      • If the DTC sets, replace the ECM. If the DTC continues to set after ECM replacement, replace the vehicle communication interface module.
      • If the DTC does not set
    3. All OK.
    • If DTC P162B is not set 
  4. All OK.
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