Symptom Chart

WARNING: This page is about a different car, the 2020 Jaguar XF and 2019 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM	POSSIBLE CAUSES	ACTION
Coolant loss	Coolant leak Coolant hose damaged Coolant hose clamp loose/damaged Radiator leaking/damaged Coolant pump seal failed Heater core leaking/damaged Seal/gasket leaking Engine casting leaking Engine core plugs leaking Thermostat Coolant pipes and joins Coolant Degassing lines and degassing point plugs Main radiator and auxiliary radiators Charge air cooler circuit leaks	Check for coolant leaks. Perform a cooling system pressure test. Rectify as necessary If overheating event is suspected perform actions in overheating article after fixing the leak
Overheating	Coolant level low Coolant contaminated Coolant leak Thermostat stuck closed Radiator airflow obstructed Cooling fan inoperative	Check the coolant level. Rectify as necessary Check the condition of the coolant. Rectify as necessary Check for coolant leaks. Perform a cooling system pressure test. Rectify as necessary Check the operation of the thermostat. Rectify as necessary Check the radiator for obstructions. Rectify as necessary Check the operation of the cooling fan. GO to PINPOINT TEST A . Check Active grille operation
Engine not reaching normal temperature	Thermostat stuck open	Check the operation of the thermostat. Rectify as necessary
Cooling fan operating at maximum speed - Engine not running	NOTE: Circuit reference - Pulse Width Modulated (PWM) - Cooling fan control module PWM signal circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the cooling fan control module PWM signal circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Cooling fan is stationary - Engine running	NOTE: Circuit reference - IGN - Cooling fan control module ignition signal circuit short circuit to ground, short circuit to power, open circuit, high resistance	Refer to the electrical circuit diagrams and check the cooling fan control module ignition signal circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Message centre displays "Coolant Level Low" warning message	Coolant loss Engine coolant level sensor fault Engine coolant level sensor circuit fault	GO to PINPOINT TEST B .