What if the throttle 5v signal is less than 5v?

1. The analog throttle position sensor (TPS) is a variable resistor (potentiometer) that tells the computer the throttle position. Most throttle position sensors include a sliding contact arm connected to the throttle shaft, which slides on a length of resistive material, which is placed around the axis of the movable contact.

2. The throttle position sensor is a three-wire sensor. One wire draws 5V voltage from the sensor power supply of the computer to supply power to the sensor resistance material, and the other wire is connected with the other end of the resistance material to provide grounding for the sensor. The third wire is connected to the movable contact of the sensor, which provides signal output to the computer. The voltage at each point on the resistive material is detected by the movable contact and is proportional to the throttle angle.

This is an important sensor because the computer uses its signal to calculate engine load, ignition time, exhaust gas recirculation control, idle speed control and other parameters, such as transmission shift point. Poor throttle body position sensor will lead to acceleration lag and idle speed problems, as well as driving performance problems and emission test failure.