DTC U0404-86: Invalid Data Received From Gear Shift Control Module "A" - Signal invalid: Action
WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Check transmission control switch for related DTCs and refer to relevant DTC index
- Using the Jaguar Land Rover approved diagnostic equipment, perform a CAN network integrity test
- Refer to the appropriate system wiring diagram and check transmission control switch power and ground circuits for open circuit
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest