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Q:does this part control the rpm gauge when car is in park and idleing.does this part affect gas mileage.
A:A throttle position sensor (TPS) is a sensor used to monitor the position of the throttle in an internal combustion engine. The sensor is usually located on the butterfly spindle so that it can directly monitor the position of the throttle. The throttle position sensor helps the engine set the correct fuel mixture for the vehicle from moment to moment, and if this sensor malfunctions, the car can experience a host of problems, such as stalling, rough idling and lackluster engine performance.