Circuit/System Verification
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify there are no other DTCs set, except for DTC P156D.
- If any other DTCs are set
- Go to next step: If only DTC P156D is set
- Replace the component:T19 Power Supply Transformer
- Verify the DTC does not set.
- If the DTC sets - Replace the component: K20 Engine Control Module
- Go to next step: If the DTC does not set
- All OK.