DTC P004B-84: Turbocharger/Supercharger Boost Control "B" Circuit Range/Performance - Signal below allowable range: 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 secondary turbocharger charge air shut-off valve system for leakage
- Refer to the appropriate system wiring diagram and check the secondary turbocharger charge air shut-off valve circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check and install a new secondary turbocharger charge air shut-off valve as required
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest