On a 2006 Pontiac G6, the throttle position sensor is mounted on the throttle body as part of the vehicle's electronic throttle control. It is located on the side of the throttle body where the air intake connects, and you access it by removing the intake duct—this sensor tells the engine control module the position of the throttle plate to regulate idle and acceleration.
Location and identification
To identify the TPS location on the G6, note that the throttle body sits at the end of the intake tract on the engine's side. The TPS is a small 3-wire sensor bolted to the throttle body housing, often facing outward toward the fender.
Before you start inspecting, use the following steps to locate the sensor quickly:
- Open the hood and locate the large air intake tube connected to the air filter box; follow it to where it ends at the throttle body.
- Look on the side of the throttle body for a small sensor with a three-wire electrical connector plugged into it.
- Identify the connector by its three pins and typically gray/black plastic housing; the wires run toward the engine harness.
- Note that some engine layouts place the TPS behind the intake duct, so you may need to loosen clamps and move the hose slightly for access.
- For safety, disconnect the battery negative terminal before disconnecting any electrical connectors and handling the wiring (optional but recommended in some procedures).
Accessing the TPS is straightforward on most 2006 G6 models, but take care not to bend wiring or damage the throttle body during removal.
Testing and replacement considerations
When the sensor is suspected to be faulty, you can test it with a digital multimeter or replace it with a GM/Delco TPS designed for the 2006 G6. The following steps outline a basic check and replacement approach:
- Test the sensor with the ignition on (engine off): reference voltage should be about 5 volts between the VREF (red or yellow wire) and ground.
- With the throttle pedal moved slowly from idle to wide-open throttle, monitor the TPS signal wire (usually the middle wire); you should see a smooth voltage rise from roughly 0.5–0.8 volts at idle to about 4.5–4.8 volts at wide-open throttle.
- If the voltage is erratic, sticks, or fails to change, the TPS may be failing and should be replaced.
- When replacing, disconnect the battery, remove the old sensor, install the new TPS on the throttle body, and reattach the harness; use the service manual for torque specs and any calibration steps required (some systems are "set-and-forget" while others require a dealer scan tool).
After replacement, perform a test drive to ensure smooth idle and proper acceleration without any check engine lights. If codes persist, a scan for related sensors and the throttle body calibration may be required.
Summary
The throttle position sensor on a 2006 Pontiac G6 is mounted on the throttle body of the intake system. It is a three-wire device that reports throttle plate position to the engine control module, enabling proper idle control and throttle response. Locating and testing or replacing it is a straightforward job for a DIY mechanic with basic hand tools and a multimeter, though some versions may require professional calibration.