How to Install a Throttle Position Sensor on a 2001 Grand Am

by Justin Cupler

    The 2001 Pontiac Grand Am came in four trim levels – SE, SE1, GT and GT1 – and each level came in either a coupe or sedan body style. The SE and SE1 came standard with a 150-horsepower, 2.4-liter four-cylinder and the GT and GT1 came standard with a 175-horsepower, 3.4-liter V-6. Both engines used a throttle position sensor to relay the precise angle of the vehicle’s throttle valve to the computer, so the transmission, fuel and ignition systems knew how to respond. Replacing the TP sensor on you 2001 Grand Am is a fairly simple process, but the 2.4-liter requires that you remove the resonator.

    Items you will need

    • Flat-head screwdriver
    • Ratchet
    • Socket set
    • 3-inch extension

    TP Sensor Replacement – 2.4-Liter Engine

    Step 1

    Trace the air cleaner box outlet tube toward the engine until you reach the air intake resonator – the large plastic component on the top, front of the engine. Loosen the hose clamp securing the air filter box outlet tube to the resonator, using a flat-head screwdriver. Pull the tube from the resonator. Remove the two bolts securing the resonator to the engine, using a ratchet and socket. Lift the resonator from the engine and throttle body – the resonator does not secure to the throttle body via a clamp, it is self-sealing.

    Step 2

    The throttle position sensor is on the driver side of the throttle body. Unplug the TP sensor’s electrical connector and set it aside. Remove the two screws securing the TP sensor to the throttle body, then pull the sensor from the throttle body.

    Step 3

    Guide the new sensor onto the throttle shaft inside the throttle body and hand-thread the retaining screws. Tighten the retaining screws until they are snug – there is no specified torque value, so do not over tighten them.The TP sensor is self-zeroing, so you don't have to adjust it.

    Step 4

    Connect the wiring harness to the sensor. Align the outlet end of the resonator with the inlet on the throttle body and lower the resonator onto the throttle body until the two are fully engaged. Tighten the resonator-to-engine screws until they are snug.

    Step 5

    Reconnect the air cleaner box outlet tube to the resonator and tighten the hose clamp with a flat-head screwdriver.

    TP Sensor Replacement – 3.4-Liter Engine

    Step 1

    Trace the air cleaner box outlet tube toward the engine until you reach the throttle body. Look on the rear of the throttle body to find the TP sensor.

    Step 2

    Disconnect the wiring harness connected to the TP sensor. Unfasten the sensor bolts, using a ratchet, 6-inch extension and socket. Pull the TP sensor from the throttle body.

    Step 3

    Guide the new TP sensor onto the throttle shaft in the throttle body and align the screw holes on the TP sensor with those on the throttle body. Tighten the sensor screws until they are snug -- do not over tighten them or you may cause damage.

    Step 4

    Plug the wiring harness into the TP sensor. The TP sensor is self-zeroing, so you do not need to adjust it.

    References