BMW Cooling Fault Codes
Thermostat, coolant fan, water pump electrical faults.
3 codes in this category.
P0480Cooling Fan Relay CircuitElectric cooling fan circuit fault - fan motor or relay.moderateP0597Thermostat Heater Control CircuitMap-controlled thermostat heater circuit fault.moderateP0128Coolant Thermostat Below Regulating TempEngine not reaching operating temperature - thermostat stuck open.low