Replacing The Component

Try a new thermostat. See THERMOSTAT, REPLACING .

Fig 1: Checking Thermostat

Courtesy of VOLVO CARS CORPORATION

Try a new engine coolant temperature (ECT) sensor.

• For B5xx4T, see REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR
• For B6xx4T, see ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING .

Fig 1: Identifying Engine Coolant Temperature Sensor

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION