DTC P050A-24: Cold Start Idle Air Control System Performance - Signal stuck high: Action

WARNING: This page is about a different car, the 2018 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

Using the manufacturer approved smoke test system check the intake air system is free from leakage, components are correctly installed, not loose or that damaged pipework is allowing leakage
Check Engine crankcase breather system is free from leakage, components are correctly installed, not loose or that damaged pipework is allowing leakage