![]() But, as the engine nears normal operating temperature. This improves idle quality and prevents hesitation, while the cold engine is warming up. Then, it increases injector pulse width (on time), to create a richer fuel mixture. If the (PCM) receives a cold signal from the (ECT) sensor. Input from the engine coolant temperature (ECT) sensor, may be used, by the (PCM) for any control functions: Start up fuel enrichment, on fuel injected engines P0119….Engine Coolant Temperature Circuit Intermittent.P0118….Engine Coolant Temperature Circuit High Input.P0117….Engine Coolant Temperature Circuit Low Input.P0116….Engine Coolant Temperature Circuit Range/Performance.P0115….Engine Coolant Temperature Circuit.Also, you may see one of the following, diagnostic trouble codes: The (OBD II) system, should catch the fault and turn on the, c heck engine light or (MIL) lamp. Usually is an engine control system that fails to go into closed loop, once the engine is warm. Engine Coolant Temperature (ECT) The most common symptom that indicates a bad (ECT) sensor. But, less fuel, when they are fully warmed up. Engines require, more fuel when they are cold. As a result, the (ECU) uses this data, to adjust, the fuel injection and ignition timing. Because, its readings, play a key role in calculations, which affect engine performance. The engine coolant temperature (ECT) sensor, is one of the most important, engine management sensors. The readings from the engine coolant temperature (ECT) sensor, are then sent back to the engine control unit (ECU). So, most engine coolant temperature (ECT) sensors operate, using electrical resistance to measure, the temperature of the coolant. The engine coolant temperature (ECT) sensors function, is to monitor the temperature, of the engine’s coolant. Engine Coolant Temperature (ECT) Sensor - Function - Failure and testing.
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