Radiator Coolant Temperature Sensor Circuit High

Descripción

This code means the radiator coolant temperature sensor is reporting a temperature that is too high. The car's computer is receiving a signal that suggests the engine is hotter than it actually is, which can lead to the engine shutting down to prevent damage.

Pasos de reparación

1. 1 Check coolant level in the reservoir and radiator (when engine is cool) and top off if low, as low coolant can cause high temperature readings.
2. 2 Inspect the radiator coolant temperature sensor wiring and connector for damage, corrosion, or loose connections and repair as needed.
3. 3 Check the radiator fan operation by turning on the A/C or letting the engine reach operating temperature to verify the fan engages; replace the fan motor or relay if it does not activate.
4. 4 Inspect the radiator and cooling fins for blockages, debris, or damage that may restrict airflow, and clean or repair as necessary.
5. 5 Test the thermostat by monitoring engine temperature during warm-up; if the engine overheats quickly or the upper radiator hose stays cold, replace the thermostat as it may be stuck closed.
6. 6 Test the radiator coolant temperature sensor with a multimeter to verify resistance changes appropriately with temperature; replace the sensor if readings are out of specification.
7. 7 If all above checks pass, have a professional inspect the cooling system for internal blockages, head gasket failure, or ECM issues that could cause a circuit high condition.

Diagnóstico y costo