Radiator Coolant Temperature Sensor Circuit Intermittent/Erratic

Descripción

This code indicates that the radiator coolant temperature sensor is providing readings that are inconsistent or jump around erratically. The car's computer cannot get a stable temperature reading, which can cause various engine performance issues.

Pasos de reparación

1. 1 Inspect the electrical connector at the radiator coolant temperature sensor for looseness, corrosion, or damage, and clean or reseat it as needed.
2. 2 Check the wiring harness between the radiator coolant temperature sensor and the ECM for chafing, fraying, or damaged insulation, and repair any faults found.
3. 3 Test the radiator coolant temperature sensor connector terminals for proper pin tension and secure contact, and repair or replace terminals if loose.
4. 4 Use a multimeter to check the radiator coolant temperature sensor resistance and compare readings to manufacturer specifications across a range of temperatures.
5. 5 Wiggle-test the sensor connector and wiring while monitoring live data with a scan tool to identify intermittent connection faults.
6. 6 Replace the radiator coolant temperature sensor if resistance values are out of specification or the intermittent fault persists after wiring repairs.
7. 7 Clear the diagnostic trouble codes and perform a road test to verify the repair and confirm stable temperature readings.

Diagnóstico y costo