Symptom Chart

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

SYMPTOM	POSSIBLE CAUSES	ACTION
Coolant loss	Hoses Hose connections Radiator Water pump Heater core Gaskets Engine casting cracks Engine block core plugs	Carry out a visual inspection. If there are no obvious leaks, carry out a cooling system pressure test. Rectify any leaks as necessary. Refer to the relevant section of the service information
Overheating	Low/contaminated coolant Thermostat Cooling fan Engine coolant temperature sensor Restricted air flow over the radiator Active grill air shutter	Check the coolant level and condition. Carry out a cooling system pressure test. Rectify any leaks as necessary. Check the thermostat and rectify as necessary. Check the cooling fan operation, make sure the cooling fan rotates freely. Check for obstructions to the air flow over the radiator. Check the active grill air shutter operation using the manufacturer approved service tool
Engine not reaching normal temperature	Thermostat Cooling fan	Check the thermostat operation. Check the cooling fan operation, make sure the cooling fan is not seized