Possible Causes

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

The engine control module measures a signal that remains low when transitions are expected
On a previous drive cycle a crank and failure to start occurred
Fuel quantity control valve poor performance
Fuel injector stuck open
Fuel injector failure
Fuel rail pressure sensor circuit, short circuit to ground, short circuit to power, open circuit, high resistance