DTC U0121-87: Lost Communication With Anti-Lock Brake System (ABS) Control Module - Missing message: Action
- Refer to the appropriate system wiring diagrams and check the power and ground connections to the ABS module. Clear DTC and retest
- Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the CAN network between the ABS module and the parking aid control module