DTC U0256-00: Lost communication with Integrated Control Panel - Missing message: Action
- Refer to the appropriate electrical circuit wiring diagrams and check the power and ground connections to the integrated control panel
- Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the appropriate electrical circuit wiring diagrams and check the CAN network between the integrated control panel and the instrument cluster
- Check the integrated control panel for related diagnostic trouble codes and refer to the relevant diagnostic trouble code index