Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Do NOT replace the control module if DTC P0700 is set.
DTC P0700 is an informational DTC.
Correct any Engine Controls and Serial Data DTCs before diagnosing the following system/component DTCs: Transmission

Verify there are no DTCs set related to the following component/system:
- Engine Controls and Fuel
- Serial Data
- If a related DTC is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a related DTC is not set
Verify there are no DTCs set related to the following component/system: Transmission
- If a related DTC is set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a related DTC is not set
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify no other DTCs are set.
- If other DTCs are set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no other DTCs are set
All OK.