B0483

Read the instructions below then start the fault diagnostic procedure.

Symptom: Poor heating of cabin Heater switched off but allowed to restart

B0483

Fault symptoms

Poor heating of cabin

Heater switched off but allowed to restart

Conditions

Heater running.

The difference between coolant temperature sensor 1 and 2 exceeds 25°C (77°F) and the coolant temperature sensor registers a temperature exceeding 70°C (158°F).

Important

This DTC is generated if the car's cooling system is not correctly bled.

Diagnostic help

The temperature from coolant temperature sensor 1 and 2 can be read using the diagnostic tool.

The heater has an extra cable and connector that is separate from the ordinary wiring on the heater. This cable and connector are not used but are connected to the control module. Therefore, check that this cable is undamaged before starting fault diagnosis.

The ordinary wiring between the heater and the 8-pin connector contains an additional light-green wire that is cut and not used.