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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • DTC P15F7 is an informational DTC.
  • Diagnose all other K20 Engine Control Module DTCs prior to DTC P15F7.
  1. Verify there are no other K20 Engine Control Module or communication DTCs set.
    • Go to next step: If a DTC is not set 
  2. Complete the diagnosis by looking for an intermittent serial data circuit fault. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
    • If an intermittent serial data circuit fault is found 

      Repair as necessary.

    • Go to next step: If an intermittent serial circuit fault is not found 
  3. Clear DTCs and operate the vehicle in the conditions that the customer experienced.
  4. Verify DTC P15F7 does not set.
    • If the DTC sets 

      Replace the appropriate component: K182 Parking Assist Control Module

    • Go to next step: If the DTC does not set 
  5. All OK.
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