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Home >> Buick >> 2021 >> Enclave Essence, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Information and Procedures >> DTC P158A >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no other DTCs set, except for DTC P158A.
    • Go to next step: If no other DTCs are set 
    NOTE:

    During the programming procedure, follow the Service Programming System (SPS) prompts for the correct ignition switch position.

  3. Reprogram ECU » » K9 Body Control Module & K20 Engine Control Module
  4. Operate the vehicle within the Conditions for Running the DTC. - Verify the DTC does not set.
    • Go to next step: If the DTC is not set 
  5. All OK.
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