Engine Coolant Temperature Circuit Intermittent

Descripción

This code means the engine coolant temperature sensor is giving inconsistent readings over time. The temperature is jumping around erratically, which confuses the engine computer.

Pasos de reparación

1. 1 Inspect the wiring and connector at the engine coolant temperature (ECT) sensor for loose, corroded, or damaged connections and repair as needed.
2. 2 Check the cooling system for air pockets by bleeding the system according to your vehicle's service manual procedure.
3. 3 Wiggle-test the ECT sensor connector and wiring harness while monitoring live data to identify any intermittent faults.
4. 4 Check the ECT sensor readings using an OBD-II scanner with live data — values should change smoothly with engine temperature and not spike or drop erratically.
5. 5 Replace the engine coolant temperature (ECT) sensor if readings are erratic or out of range.
6. 6 Inspect the wiring harness between the ECT sensor and the ECM for chafing, breaks, or short circuits, and repair or replace damaged sections.
7. 7 Have the engine control module (ECM) tested and reprogrammed or replaced if all other components test normal and the fault persists.

Diagnóstico y costo