P012B-23 - Turbocharger/Supercharger Inlet Pressure Sensor Circuit Range/Performance - Signal stuck low: Action

WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the applicable SYSTEM WIRING DIAGRAMS and check manifold absolute pressure sensor 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
Using the Jaguar Land Rover approved diagnostic equipment check throttle position voltage at ignition on
Check intake manifold for leakage, loose or missing components
Check air filter for blockage or restriction
Check engine breather system for leakage
Check throttle blade for carbon obstruction
Check and install a new manifold absolute pressure sensor as required
Check catalytic converter for damage
Check exhaust system for blockage
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest