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What Are the Functions of an Automotive Throttle Position Sensor?

1Answers
DelJuniper
07/24/2025, 02:44:52 PM

The function of an automotive throttle position sensor is to detect whether the engine is in idle condition or under load, whether it is accelerating or decelerating. Essentially, it is a variable resistor with several switches, installed on the throttle body. The throttle position sensor is also known as the throttle opening sensor. The resistor's rotating shaft is linked to the throttle and has two contacts: a full-open contact and an idle contact. When the throttle is in the idle position, the idle contact closes, sending an idle condition signal to the computer. When the throttle is in other positions, the idle contact opens, outputting voltage signals corresponding to different throttle angles. The computer then identifies the engine's load based on the signal voltage value.

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