Symptom Chart

WARNING: This page is about a different variant/trim than selected.

SYMPTOM	POSSIBLE CAUSES	ACTION
Coolant loss	Coolant hose(s) leaking Coolant hose connection(s) leaking Radiator leaking Variable coolant pump leaking Heater core leaking Seals leaking Engine casting leaking Engine core plugs leaking	GO to PINPOINT TEST A .
Thermostat coolant leak - Evident fluid leak from the engine compartment and the "Coolant Level Low" warning message may be on the cluster	Coolant leak Mechanical damage to the thermostat Loose hose clamps Misalignment in the thermostat body Damaged thermostat seal	GO to PINPOINT TEST F .
Engine overheating	Coolant level low Thermostat flow/direction valve fault Electric cooling fan inoperative Engine coolant temperature sensor fault Radiator airflow restricted Accessory drive/coolant pump drive (PHEV vehicles) belt misaligned	GO to PINPOINT TEST B . Check the accessory drive/coolant pump drive belt is secure/correctly aligned so as to provide sufficient drive to the coolant pump. If the accessory drive/coolant pump drive belt is found to be misaligned or damaged, it must be REPLACED
Engine not reaching normal operating temperature	Thermostat flow/direction valve fault Electric cooling fan stuck on	GO to PINPOINT TEST D .
Message centare displays "Coolant Level Low" warning message	Coolant loss Engine coolant level sensor fault Engine coolant level sensor circuit fault	GO to PINPOINT TEST E .