GMC 17106681 Throttle Position Sensor

The Throttle Position Sensor (TPS) is a potentiometer attached to the end of the throttle shaft on the throttle body. It senses changes in output voltage to determine fuel delivery according to angle of throttle valve. Irregular bursts of fuel and an unsteady idle could be caused by a worn-out or slack TPS. The position sensor is located on one side of the throttle body. Look for loose terminals and wires, otherwise this sensor will not work properly. Prior to checking TPS, make sure that supply voltage and ground circuit are operational. Unplug the electrical connector and measure voltage across it, which should be about 5.0 volts. Otherwise, examine wiring too if not okay. To test its operation, reconnect with probe touching the dark blue wire terminal from behind as you gradually open up until there is smooth rise in voltage; otherwise replace it with another one as earlier mentioned above. In order to install a new TPS, remove some parts first in order to gain access for it including: disconnecting the electric connector while separating mounting screws too; besides these actions they have installed a new O-ring plus aligned TPS over which tightening had been done through screwing those four screws so that their ends only would remain visible underneath its groove where replacement must take place when necessary!