DTC C1B18-2F: Module Power Supplies - Signal erratic: Action
WARNING: This page is about a different car, the 2021 Land Rover Range Rover Sport, 2020 Land Rover Range Rover Sport, and 2019 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.
- Check the module connector(s) for security and integrity. Rectify as required
- Refer to the appropriate system wiring diagrams and check the power supply circuit(s) to the module for poor or intermittent connection. Repair circuit(s) as required, clear the DTCs and retest