![]() This causes the computer to erroneously counterbalance the signal, thereby causing the engine to misfire or overheat. At times, the coolant temperature switch may fail such that it starts transmitting hot signals permanently. Your heat/AC will freak out but there will be no effect in the engine. If you notice that your engine overheats, the coolant temperature sensor could be the problem. So, if either sensor wire (ECT signal or signal return) is cut or if there is an open circuit in the sensor itself, the voltage will read 4.6 volts, which equates to -40 degrees which is where Fahrenheit and Celcius cross. Ambient temp sensor is not going to affect the engine performance. The ECM/PCM is measuring sensor voltage between this internal ECM/PCM resistor and the Thermistor built into the ECT. There is an inverse relationship between the electrical resistance and the engine. In terms of resistance capacity, this coolant sensor has 20,000 ohms at 248 degrees Fahrenheit. It is used by the heating and A/C systems. The coolant temperature sensor is fastened to the intake manifold of an engine coolant and is often referred to as a negative temperature coefficient type of sensor. Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm. An ECT sensor provides a measure of the engines coolant temperature to the Engine Control Module (ECM), as part of the engine load sensing apparatus. Similarly, you may ask, does ambient air temperature sensor affect engine The ambient temp sensor is not used for the engine or emission control. Most ECT sensors have a Negative Temperature Coefficient (NTC) characteristic. It is therefore partly responsible for the determination of fuelling, timing and engine speed requirements. Difficulties with starting a cold engine. An ECT sensor provides a measure of the engine’s coolant temperature to the Engine Control Module (ECM), as part of the engine load sensing apparatus. PO Box, Albania, Algeria, Andorra, Angola, Argentina, Armenia, Azerbaijan Republic, Bahrain, Barbados, Belize, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Cambodia, Cameroon, Chile, China, Colombia, Cook Islands, Costa Rica, Dominican Republic, Ecuador, Egypt, El Salvador, Fiji, France, French Guiana, French Polynesia, Georgia, Germany, Ghana, Gibraltar, Greenland, Guadeloupe, Guam, Guatemala, Guernsey, Honduras, Hong Kong, Iceland, India, Indonesia, Jamaica, Jersey, Jordan, Kazakhstan, Kenya, Kuwait, Lebanon, Macedonia, Malawi, Maldives, Martinique, Mauritius, Mayotte, Moldova, Montenegro, Morocco, Mozambique, Namibia, New Caledonia, Nicaragua, Nigeria, Oman, Pakistan, Palau, Panama, Papua New Guinea, Peru, Puerto Rico, Qatar, Reunion, Russian Federation, Rwanda, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Senegal, Serbia, Seychelles, Sri Lanka, Taiwan, Tanzania, Trinidad and Tobago, Tunisia, Turkey, Uganda, Ukraine, United States, Uruguay, Vanuatu, Venezuela, Virgin Islands (U.S. Engine Coolant Temperature Sensor (G62) - Signal too High Possible Cause: Malfunction Indicator Lamp (MIL)(K83) active.
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