Engine Coolant Temperature Circuit Low

Descripción

This code means the engine coolant temperature sensor is reporting a temperature that is too low. It's like the sensor is saying the engine is always cold, even when it's warmed up.

Pasos de reparación

1. 1 Check engine coolant level and top off if low, as insufficient coolant can cause inaccurate temperature readings.
2. 2 Inspect the engine coolant temperature (ECT) sensor connector for corrosion, damage, or loose pins, and clean or reseat as needed.
3. 3 Check the wiring harness between the ECT sensor and the ECM for damaged, chafed, or bare wires that may be shorting to ground.
4. 4 Test the ECT sensor resistance with a multimeter — it should change predictably with temperature (typically 2,000–3,000 ohms at room temperature); replace if readings are out of spec.
5. 5 Replace the engine coolant temperature (ECT) sensor if testing confirms it is faulty.
6. 6 Repair or replace any damaged wiring or connectors in the ECT sensor circuit if a short to ground is found.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if the sensor and wiring are confirmed good, as a faulty ECM may be misreading the signal.

Diagnóstico y costo