B0483

Read the instructions below then start the fault diagnostic procedure.

Symptom: Poor heating of cabin Heater is stopped but is permitted to attempt restart

B0483

Fault symptom

Poor heating of cabin

Heater is stopped but is permitted to attempt restart

Conditions

Heater is activated.

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

Important

This diagnostic trouble code is generated if the cooling system of the car is not correctly bled of air.

Diagnostic help

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

The heater is provided with extra cabling and connector which is isolated from the ordinary cabling from the heater. This cabling and connector is not used but is connected to the control module, therefore always check that this cabling is undamaged before beginning fault tracing.

In the ordinary cabling between the heater and the 8-pin connector, there is an extra light green lead that is cut and is not used.