Standard Ignition TH289 Throttle Position Sensor

Throttle Position Sensor for OE-Style Signal Control

Standard Ignition TH289 is a throttle position sensor built to maintain the installed output required for OE-style operation. It is a direct-fit emission control sensor for vehicles such as the Chevrolet Cavalier, Pontiac Grand Am, and Saturn Ion, with signal stability and connector fit designed for service replacement work.

• Female connector with 1 plug-in connection
• 3 male blade terminals
• Flexible polyimide film or ceramic-based circuit construction for dimensional stability
• Noble metal contact materials for low resistance and longer service life
• Integral rotor bearings and return springs for straightforward installation
• End-of-line tested with thousands of data points to verify output voltage

Detailed Product Overview

The TH289 throttle position sensor monitors throttle angle and sends the engine control module a voltage signal that changes as the throttle opens and closes. Standard Ignition uses a fixed installed-output design rather than an adjustable consolidated style, helping preserve the OE calibration expected by the vehicle. This part number is a practical replacement for 2002-2005 Chevrolet Cavalier, 2002-2005 Pontiac Grand Am, and 2003-2005 Saturn Ion applications, along with other listed GM platforms.

This part cross-references Four Seasons 75302 for the same application.

What It Helps Address

• Throttle position signal errors
• Rough or inconsistent acceleration response
• Check engine lights related to throttle sensor performance
• Unstable idle caused by incorrect throttle feedback
• Driveability issues from worn sensor contacts

Installation Notes and Tips

Verify connector style, terminal count, and throttle body application before installation. The TH289 uses a female plug-in connector with 3 male blade terminals, so matching the electrical interface is important for proper fit. For 2004-2005 Chevrolet Malibu Old Body Style, 2002-2004 Oldsmobile Alero, and 2004 Saturn L300 applications, confirm the vehicle listing before ordering.

Quality Assurance

Standard Ignition maintains quality control through the manufacturing process, from component selection to finished product. Each sensor is tested at the end of the line to confirm output voltage performance and consistent operation.