GMC Canyon (2009-2012) Throttle Position Sensor Guide
Experiencing reduced power or a rough idle in your truck? It could be the throttle position sensor.
- The 'Reduced Engine Power' warning is a classic sign of a failed TPS on these trucks, often with code P2135.
- GM acknowledged this common failure with a Special Coverage Adjustment (11273B), confirming the OEM part's weakness.
- You can replace just the sensor, not the entire expensive throttle body assembly.
- Choosing a premium aftermarket brand like NGK or Standard Ignition is recommended over the failure-prone OEM part.
Is Your Truck Suddenly Losing Power?
If you own a 2009-2012 GMC Canyon, one of the most common and frustrating problems you might face is a sudden "Reduced Engine Power" message on your dashboard. This "limp mode" severely limits your acceleration and is a major safety concern. 🎬 Watch this guide on common symptoms of a bad sensor. Often, the culprit is a faulty throttle position sensor (TPS). This component is a known weak point on these trucks, and General Motors even issued a special warranty extension to cover it, though that has likely expired for most owners by now.
Known Issue: Special Coverage Adjustment 11273B
GM acknowledged a high failure rate for the throttle position sensor on 2009-2011 GMC Canyons (and other models) under Special Coverage Adjustment 11273B. This was not a recall but an extended warranty, covering the part for 10 years or 120,000 miles. The primary symptom was the "Reduced Engine Power" mode, often linked to Diagnostic Trouble Code (DTC) P2135. 🎬 See how this specific code causes engine power issues. While this program has expired, it confirms that the original sensors are prone to failure.
OEM vs. Aftermarket Throttle Position Sensors
When your original TPS fails, you have a choice between an OEM (Original Equipment Manufacturer) part from a dealer and an aftermarket part. For this specific issue on the Canyon, going with a quality aftermarket part is a smart decision. The original GM sensors have a documented history of premature failure. Reputable aftermarket brands often engineer their parts to correct the flaws of the original design. Since the sensor is a relatively simple and inexpensive part to replace, you can get a reliable, long-lasting fix without paying the higher price for an OEM part that is known to be faulty.
Choosing the Right Aftermarket Brand
Not all aftermarket parts are created equal. For your Canyon, it's best to stick with established brands known for their electronic components.
- Premium Tier (NGK/NTK, Standard Ignition): NGK (under their NTK sensor brand) and Standard Motor Products (Standard Ignition) are top-tier choices. They have a strong reputation for producing sensors that meet or exceed OEM specifications. These brands invest in quality materials and testing to ensure reliability and longevity, which is what you want for this particular part.
- Mid-Grade (Motorad): Motorad is a solid mid-grade option. They produce a wide range of automotive parts and their sensors are manufactured to meet OEM standards, often at a more budget-friendly price point.
- Standard/Economy Tier (Global Parts): Brands like Global Parts (GPD) offer a more economical solution. While they are designed to be a direct fit and function replacement, they may not have the same level of rigorous testing or premium materials as the higher-tier brands. For a critical sensor like the TPS, spending a little more for a premium brand is often worth the peace of mind.
Cost at a Glance: 2009-2012 GMC Canyon TPS
| Part Type | Estimated Cost (Part Only) |
|---|---|
| New Aftermarket | $67.73 - $82.50 |
| New OEM (GM Genuine) | $95 - $150 |
| Shop Labor | $75 - $125 |
Pro Tip: Replace the Gasket
The throttle position sensor mounts to the throttle body. When you replace the sensor, you will also need to replace the throttle body gasket to ensure a proper seal and prevent vacuum leaks. Many aftermarket sensor kits include a new gasket.
Frequently Asked Questions
Can I replace just the sensor or do I need a whole new throttle body?
Yes, for the 2009-2012 GMC Canyon, you can replace just the throttle position sensor. It is sold as a separate component from the main throttle body assembly, which saves significant cost and effort.
Is a "relearn" procedure necessary after replacement?
Yes, after replacing the TPS or throttle body, a relearn procedure is recommended to ensure the engine's computer recognizes the new sensor's parameters. A common procedure involves starting the engine and letting it idle for 3 minutes, turning it off for 60 seconds, and repeating this cycle. Afterward, a short drive may be needed for the computer to fully adjust.
What tools are needed to replace the TPS?
This is a DIY-friendly job. You will typically need a basic socket set (8mm and 10mm are common), a flathead screwdriver, and possibly a trim tool or pick 🎬 Follow this step-by-step video to replace the sensor yourself. to help with clips and gaskets.
What does the code P2135 mean?
P2135 stands for "Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation." Your truck's computer uses two sensors to monitor the throttle plate. This code means the signals from those two sensors don't match, which the computer sees as a fault. This is the most common code associated with a failing TPS on these trucks.
Helpful Videos
Technical Specifications
OEM Part Numbers: 19259452
The throttle position sensor for the 2009-2012 GMC Canyon is a non-contact, Hall-effect type sensor that mounts directly to the throttle body. It uses changes in a magnetic field to determine the throttle plate's position and sends a voltage signal to the ECM. Aftermarket kits often include the sensor, a new cover, and a new gasket.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- GMC Canyon:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Truck Suddenly Losing Power?
- Known Issue: Special Coverage Adjustment 11273B
- OEM vs. Aftermarket Throttle Position Sensors
- Choosing the Right Aftermarket Brand
- Cost at a Glance: 2009-2012 GMC Canyon TPS
- Pro Tip: Replace the Gasket
- Frequently Asked Questions
- 🎟️ Get 5% Off