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P2135 2014 GMC Sierra Code - Throttle Position Sensors 1-2 Not Plausible

Quick Answer

The P2135 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that there is an issue with the throttle position sensors 1-2 not being in agreement or "plausible." This means that the signals from the throttle position sensors are not matching up as expected by the engine control module (ECM). Common causes include Faulty throttle position sensors, Wiring issues or shorts in the throttle position sensor circuit, Corrosion or damage to the connectors or terminals of the sensors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2135 2014 GMC Sierra indicates Throttle Position Sensors 1-2 Not Plausible.
Common causes
Common causes include Faulty throttle position sensors, Wiring issues or shorts in the throttle position sensor circuit, Corrosion or damage to the connectors or terminals of the sensors.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P2135 2014 GMC Sierra Description

The P2135 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that there is an issue with the throttle position sensors 1-2 not being in agreement or "plausible." This means that the signals from the throttle position sensors are not matching up as expected by the engine control module (ECM). In modern vehicles, throttle position sensors play a crucial role in communicating the position of the throttle to the ECM, which then adjusts fuel delivery and air intake accordingly. When there is a discrepancy between the signals from the two sensors, it can cause a variety of issues with the vehicle's performance.

OBDII Code P2135 2014 GMC Sierra - Throttle Position Sensors 1-2 Not Plausible
P2135 2014 GMC Sierra Code - Throttle Position Sensors 1-2 Not Plausible

Common Causes of P2135 2014 GMC Sierra

  1. Faulty throttle position sensors
  2. Wiring issues or shorts in the throttle position sensor circuit
  3. Corrosion or damage to the connectors or terminals of the sensors
  4. ECM software or hardware issues
  5. Mechanical issues with the throttle body

Symptoms of P2135 2014 GMC Sierra

  1. Poor acceleration
  2. Rough idling
  3. Stalling
  4. Hesitation when accelerating
  5. Lack of throttle response

How to Fix P2135 2014 GMC Sierra

  1. Diagnose the issue by using a scan tool to read the trouble codes and check the live data from the throttle position sensors.
  2. Inspect the wiring and connectors for any signs of damage, corrosion, or loose connections.
  3. Test the throttle position sensors using a multimeter to verify if they are functioning correctly.
  4. Replace any faulty throttle position sensors, wiring, or connectors as needed.
  5. Clear the trouble codes and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P2135 2014 GMC Sierra

The typical repair costs for addressing a P2135 code on a 2014 GMC Sierra can vary depending on the exact cause of the issue. In general, replacing faulty throttle position sensors, wiring, or connectors can cost anywhere from $200 to $500, including parts and labor. Additional diagnostic time may be required to pinpoint the exact cause of the problem, which can add to the overall cost. It's important to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can vary widely, so it's advisable to shop around for the best deal.

What does this mean?

Tech Notes for P2135 2014 GMC Sierra









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2135 2014 GMC Sierra Code

1. What does the OBDII code P2135 for a 2014 GMC Sierra mean?

The code P2135 indicates that there is an issue with the throttle position sensors 1-2 not being plausible.

2. What are the common symptoms associated with OBDII code P2135 on a 2014 GMC Sierra?

Common symptoms include a lack of acceleration, reduced engine power, stalling, and the Check Engine light being illuminated.

3. What are the potential causes of OBDII code P2135 on a 2014 GMC Sierra?

Possible causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or problems with the vehicle's electronic control module.

4. How can I diagnose the OBDII code P2135 on my 2014 GMC Sierra?

Diagnosing the issue may involve using a scan tool to check for the specific error code, testing the throttle position sensor's voltage, inspecting the wiring and connectors for damage, and checking the throttle body for any obstructions or malfunctions.

5. Can I continue to drive my 2014 GMC Sierra with the OBDII code P2135?

It is not recommended to continue driving the vehicle with the code P2135 present, as it can lead to further damage and safety issues. It's best to address the problem promptly.

6. How can I repair OBDII code P2135 on my 2014 GMC Sierra?

Repair options may include replacing the faulty throttle position sensor, repairing or replacing damaged wiring or connectors, cleaning or replacing the throttle body, or resetting the electronic control module.

7. Is it possible to reset the OBDII code P2135 on a 2014 GMC Sierra without fixing the underlying issue?

While clearing the code may temporarily turn off the Check Engine light, it will not fix the root cause of the problem. It's essential to address the issue to prevent it from recurring.

8. Can a DIY enthusiast fix the OBDII code P2135 on a 2014 GMC Sierra?

Depending on their skill level and experience, a DIY enthusiast may be able to address the issue by following repair guides and using the necessary tools. However, complex issues may require professional assistance.

9. How much does it cost to repair OBDII code P2135 on a 2014 GMC Sierra?

The cost of repairing the code P2135 can vary based on the specific cause of the issue, the parts needed for replacement, and whether professional labor is required. It's advisable to obtain estimates from mechanics or repair shops.

10. Will fixing the OBDII code P2135 on my 2014 GMC Sierra improve the vehicle's performance?

Correcting the issue indicated by the code P2135 can help restore the vehicle's performance, improve engine power, acceleration, and fuel efficiency, and prevent potential safety hazards associated with throttle malfunctions.

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