Pontiac Grand Am Vehicle Speed Sensor in US

The vehicle speed sensor on the Pontiac Grand Am is a single component whose data feeds multiple vehicle systems at once on your Grand Am. When it fails on the Pontiac Grand Am, the effects appear across your Grand Am speedometer, transmission, cruise control, and ABS simultaneously, making diagnosis less straightforward than a fault that affects only one system on the Pontiac Grand Am.

Signs of a Failing Vehicle Speed Sensor on the Pontiac Grand Am

• Speedometer on your Pontiac Grand Am reading zero, displaying erratically, or showing an inaccurate speed
• Harsh, erratic, or delayed transmission shifting on the Grand Am, the TCM uses speed data to determine shift points
• Cruise control on your Pontiac Grand Am refuses to engage or cuts out unexpectedly during use
• ABS or traction control warning lights illuminated on the Grand Am dashboard
• Check engine light on your Pontiac Grand Am with stored codes P0500, P0501, or P0502
• Grand Am transmission entering limp mode, locking into a single gear to prevent damage

Transmission-Mounted vs. Wheel-Mounted Speed Sensors on the Pontiac Grand Am

On older Pontiac Grand Am vehicles and most rear-wheel-drive designs, a dedicated transmission-mounted speed sensor monitors output shaft speed on the Grand Am and serves as the primary reference for the Grand Am speedometer and transmission control module. On modern Pontiac Grand Am front-wheel-drive and all-wheel-drive platforms, wheel hub sensors serve the dual function of ABS speed sensing and vehicle speed data delivery on the Grand Am, one sensor feeding multiple Pontiac Grand Am systems from a single mounting point.

Why GeoBrakes for the Pontiac Grand Am Vehicle Speed Sensor

Signal accuracy is the defining specification for a Pontiac Grand Am vehicle speed sensor. A sensor that generates the wrong pulse frequency for your Grand Am control modules produces incorrect speedometer readings, mis-timed transmission shifts, and inaccurate ABS calibration on your Pontiac Grand Am, even if it passes a basic resistance test. Every speed sensor in the GeoBrakes catalogue is sourced to the correct signal frequency for the Pontiac Grand Am exact year, make, model, and sensor position.

Frequently Asked Questions - Pontiac Grand Am Vehicle Speed Sensor

Can a faulty speed sensor affect the transmission on my Pontiac Grand Am?

Yes. The Pontiac Grand Am transmission control module relies on vehicle speed data to calculate correct shift timing. A failed Grand Am speed sensor can cause erratic shifting, delayed upshifts, incorrect downshifts, or trigger Grand Am limp mode.

Will a bad vehicle speed sensor turn on the check engine light on my Pontiac Grand Am?

Yes. A failed Pontiac Grand Am vehicle speed sensor typically stores fault codes P0500, P0501, or P0502. Depending on the Grand Am, it may also trigger ABS, traction control, or transmission warning lights simultaneously.

Is the vehicle speed sensor the same as the ABS wheel speed sensor on my Pontiac Grand Am?

On many modern Pontiac Grand Am vehicles, yes, wheel hub sensors serve both the ABS system and vehicle speed sensing simultaneously on your Grand Am. On older Grand Am vehicles with transmission-mounted speed sensors, they are separate components. Use the GeoBrakes vehicle selector to confirm the correct sensor type for your Pontiac Grand Am.