Genuine Chevrolet Metro Throttle Position Sensor

Chevrolet Metro Throttle Position Sensor Parts Questions & Experts Answers

• Sensor
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  Q: How to Check and Replac Coolant Temperature Sensor,Crankshaft Position Sensor,Intake Manifold Temperature Sensor,MAP Sensor,Oxygen Sensor,Throttle Position Sensor and Vehicle Speed Sensor on Chevrolet Metro?

  A: Almost all elements have an extended warranty required by the Federal government, so it is unwise to check or replace any of them while under warranty. After the warranty period has lapsed, you may opt to do checks or replacements for lesser money. The oxygen sensor is placed in the exhaust manifold and measures the concentration of oxygen in the exhaust gas with another in the catalytic converter for recheck of emissions level. An open or shorted oxygen circuit will set a code 13. Coolant temp sensor is a thermistor mounted on the intake manifold or TBI unit that provides voltage variations by the change in temperature; a faulty one causes a code 14, 15. To test it, the connector needs to be unplugged and the resistance needs to be checked with an ohmmeter, which, if does not correspond to the specified figure, means that the sensor is to be replaced. The manifold air temperature (MAT) sensor, placed in the air cleaner housing, determines the air temperature getting into the intake manifold and controls the fuel delivery; if it fails, the code 24 appears. The manifold absolute pressure (MAP) sensor supervises changes in intake manifold pressure converting this info into a voltage level for use by the ECM in delivery of fuel, among other functions; only unit substitution is doable in case of a failure. The cruise control module on 3.5L engines calculates fuel delivery based on throttle valve angle through throttle switch (TS) on manual transaxle models or by throttle position sensor (TPS) on automatic transaxle models, and such failures cause the code 21 or 22 and requires dealer service for diagnosis or for replacement. The VSS, incorporated into the speedometer, transmits a pulsing voltage signal to the ECM to be converted into MPH; a malfunction results in a code 24 and requires dealer troubleshooting. The Crank angle sensor which is mounted on the distributor produces pulsating AC voltage signal, which is used by the ECM to determine the engine speed and to control a number of devices.