DTC P0476-84: Exhaust Pressure Control Valve "A" 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.

Using the Jaguar Land Rover Approved Diagnostic Equipment, check the powertrain control module for related DTCs. Repair as necessary, clear the DTCs and retest
Using the Jaguar Land Rover Approved Diagnostic Equipment, check and compare datalogging signals - Low Pressure EGR Exhaust Flap Motor Duty Cycle - Commanded (05D2) - Low Pressure EGR Exhaust Flap Position - Measured (05CC). Ensure the valve operates smoothly and the Measured position follows the Commanded position. If the position signal does not change smoothly in proportion to the commands, check the mechanical operation of the valve. Check and install a new exhaust pressure control valve as necessary. If the valve is replaced use the Jaguar Land Rover Approved Diagnostic Equipment and perform routine - Exhaust valve adaption