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AutoCodes – GMC – P2135 GMC

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

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body harness is open or shorted, Throttle Body circuit poor electrical connection. 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 GMC indicates Throttle Position Sensors 1-2 Not Plausible.
Common causes
Common causes include Faulty Throttle Body Assembly, Throttle Body harness is open or shorted, Throttle Body circuit poor electrical connection.
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.
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Code Popularity 66,137
How popular is this code, among other codes? Medium
What is this?
Table of contents Created and updated by William Orellana on Jul 23, 2023
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Code P2135 GMC Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that throttle position sensors 1 and 2 disagree greater than 7 - 10 percent for greater than 1 s.
OBDII Code P2135 GMC - Throttle Position Sensors 1-2 Not Plausible - AutoCodes.com
P2135 GMC Code - Throttle Position Sensors 1-2 Not Plausible
What does this mean?

What are the Possible Causes of the DTC P2135 GMC?

  • Faulty Throttle Body Assembly
  • Throttle Body harness is open or shorted
  • Throttle Body circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P2135 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a factory service bulletin for the following GMC models:
2008-2009 GMC Envoy
2008-2011 GMC Canyon
2008-2011 GMC Savana
2008-2011 GMC Sierra
2008-2011 GMC Sierra Denali
2008-2011 GMC Yukon
2008-2011 GMC Yukon Denali
2008-2011 GMC Yukon XL
2008-2011 GMC Yukon XL Denali
2008-2011 GMC Yukon Two-Mode Hybrid
2009-2011 GMC Sierra Two-Mode Hybrid
GMC Factory Service Bulletin OBDII Code P2135

Chevy / GMC Code P2135 TPS Problems








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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2135 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2135 GMC code?

Need more information on how to fix the P2135 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2135 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 GMC Code

1. What is OBDII code P2135 GMC?

OBDII code P2135 in GMC vehicles indicates a problem with the Throttle Position Sensor 1-2 Not Plausible.

2. What are common symptoms of a P2135 GMC error code?

Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into "limp mode."

3. What are the possible causes of a P2135 GMC code?

Potential causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the throttle body, or a problem with the engine control module.

4. How can I diagnose a P2135 GMC error code?

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

5. Can I still drive my vehicle with a P2135 GMC code?

It is not recommended to drive the vehicle with a P2135 code as it can lead to unsafe driving conditions and potential further damage to the engine.

6. How can I repair a P2135 GMC error code?

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

7. Can I reset the P2135 code without fixing the underlying issue?

While you can clear the error code using a scan tool, it is important to address the root cause of the problem to prevent the code from reappearing.

8. How much does it cost to fix a P2135 GMC code?

The cost of fixing a P2135 code can vary depending on the specific issue causing the code, the labor rates in your area, and whether you choose to do the repairs yourself or take your vehicle to a mechanic.

9. Are there any preventative measures to avoid a P2135 GMC code?

Regular maintenance of your vehicle, such as checking and cleaning the throttle body, inspecting wiring for damage, and ensuring proper sensor functioning, can help prevent issues that may trigger a P2135 error code.

10. Can a DIY enthusiast fix a P2135 GMC error code?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair a P2135 code. However, if you are unsure or uncomfortable with the process, it is best to consult a professional mechanic.

Discuss the causes and fixes for P2135 GMC OBDII Code

Submit a New Comment

  • The recommended thing is to change the piece, in the end if you clean it according to the recommendations of the newsletter the cost for the work is the same as if you bought the part and installed it. At least in the directors of the GMC

    Reply to Comment

  • Hey I am having 2009 Chevy Tahoe. I ran out 9f fuel on highway and had to tow the vehicle. After few start attempts after refuelling the car was fine. After 400 kms engine reduced power, traction control failure, stabilization failure warning appeared with engine check light. After three attempts to reset code via removal of battery terminals. The problem solved. However it reappeared after some time with rough idle. I have got throttle body cleaned the response has improved but it's still rough with an unusual noise. Any guidance

    Reply to Comment

  • Usually the throttle body won't cause the engine to run rough or make any noise. Have you added more gas since the problem happen?
    I recommend adding some fuel additive and fill up the gas tank with high octane gas.

    Reply to Comment

  • Thanks a lot mate. I have topped up tank with high octane fuel and put two bottles of liqui moly fuel injector cleaner. The drive is intermittent not smooth as before. Regards

    Reply to Comment
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