Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify the disable switch Indicator turns on and off when pressing and releasing the Stop/Start Select Switch.
- If the indicator does not turn on and off
  Refer to: Stop/Start System Malfunction
- Go to next step: If the indicator turns on and off
Verify that no other DTCs are set except for DTC P15A3
- If any other DTCs are set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If no other DTCs are set
Replace the K9 Body Control Module.
Verify DTC P15A3 does not set while operating the vehicle within the conditions for running the DTC.
- If the DTC sets
  Replace the K20 Engine Control Module.
- Go to next step: If the DTCs does not set
A fault is not currently present and may be an intermittent condition.