The coolant temperature sensor is an element of the engine cooling system that is responsible for turning on the radiator fan. It is often installed in the radiator itself, and sometimes on the cooling system housing.
Signs of sensor malfunction
- Poor engine starting in cold weather
- Poor engine starting when hot
- Increased fuel consumption
- Black smoke comes out of the muffler
- Problems in the operation of the engine cooling system fan
- Random activation of the cooling fan.
The reasons for sensor failure may be:
- Damage to the housing.
- Oxidation of contacts.
- Damaged contact chip
- Wire insulation damage.
At the slightest suspicion of these signs, it is necessary to diagnose the sensor and, if necessary, install a new one.
To check the sensor, it is best to contact a service station.
The part cannot be repaired. As a rule, a breakdown can be diagnosed by the fact that when the motor heats up excessively, the fan does not activate, providing airflow and intensive cooling.
Replacement of the sensor should only be done on a cold engine. Before removing the sensor, it is necessary to drain the coolant, which is unsafe to do on a hot engine.
After completing the replacement process, you should check the operation of the new coolant temperature sensor. To do this, it is recommended to start the engine and check the dashboard readings. If necessary, you need to contact a specialist again for additional diagnostics.
