Car Repair World

Vehicle Sensor Reference Guide Types Of Sensor In Your Vehicle Oxygen Sensors (O2) Throttle Position Sensor (TPS) Mass Air Flow Sensor (MAF) Engine Coolant Temperature Sensor (ECT) Intake Air Temperature Sensor (IAT) Exhaust Gas Recirculation (EGR) Most Common Engine Sensors understand the purpose and failure systems of most common sensors. Use your scantool and tech tip to diagram. Oxygen Sensors (O2) Purpose: Measure the amount of oxygen left in the exhaust stream to provide feedback to the computer about whether the air/fuel mixture is rich or lean. Symptoms: Poor fuel economy Rich fuel mixture Check Engine Light Failed emissions test Tech Tip: Test for O2 sensors in front of catalytic converter (S1B1 and S1B2 on your scantool). With the engine warm, graph the O2 sensor output. Rev the engine to approximately 2000 RPM. A good sensor will oscillate from below 0.2 volts to above 0.8 volts, looking approximately like a sine wave. A bad sensor will b...

Coolant Temperature Sensor CTS Working Procedure Of Vehicle CTS. Article describes how a engine coolant temperature sensor works. An coolant temperature sensor is located at the water outlet of the an internal combustion engine. Comprised of a housing filled with a composite which varies the resistance through the internal circuit (2 wire.) The car's computer or PCM uses this reading to make adjustments to the engine and transmission operating systems. Also described as an ECTS (electronic coolant temperature sensor) these sensors are easily tested using a voltmeter that can read the ohms of resistance at a particular engine temperature. This sensor also provides data to adjust the in-dash gauge to inform the driver on engine operating temperatures. In older models this operation was perform by a coolant sensor which was a one wire sensor that performed the gauge readings solely. Coolant Temperature Sensor ECTS When the engine is started, the computer uses sensor da...