AutoCodes – GMC – P2135 2017 GMC Sierra

P2135 2017 GMC Sierra 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 2017 GMC Sierra 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 432

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 20, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2135 2017 GMC Sierra 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 2017 GMC Sierra - Throttle Position Sensors 1-2 Not Plausible - AutoCodes.com — P2135 2017 GMC Sierra Code - Throttle Position Sensors 1-2 Not Plausible

What does this mean?

What are the Possible Causes of the DTC P2135 2017 GMC Sierra?

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 2017 GMC Sierra?

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2135 2017 GMC Sierra 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.

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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 2017 GMC Sierra Code

1. What does the OBDII code P2135 for a 2017 GMC Sierra mean?

The P2135 code indicates that the throttle position sensors 1 and 2 are not plausible, meaning there is a discrepancy between the readings of these sensors.

2. What are the common symptoms associated with the P2135 code in a GMC Sierra?

Common symptoms include issues with acceleration, reduced engine power, rough idling, and potentially triggering the vehicle into a limp mode.

3. What are the possible causes of the P2135 code in a 2017 GMC Sierra?

Potential causes of the P2135 code include a faulty throttle position sensor, damaged wiring or connectors, a dirty throttle body, or issues with the electronic throttle control system.

4. How can I diagnose the P2135 code in my GMC Sierra?

To diagnose the P2135 code, you can use an OBDII scanner to read the code and then perform a visual inspection of the throttle position sensor, wiring, and connectors. You may also need to test the sensor's voltage and resistance.

5. Can I still drive my GMC Sierra with the P2135 code?

It is not recommended to drive your GMC Sierra with the P2135 code present, as it can lead to unsafe driving conditions due to potential issues with throttle response and engine power.

6. How can I repair the P2135 code in my 2017 GMC Sierra?

Depending on the exact cause of the P2135 code, you may need to replace the throttle position sensor, repair damaged wiring or connectors, clean the throttle body, or reset the electronic throttle control system.

7. Is it possible to reset the P2135 code in a GMC Sierra without repairing the issue?

While you can clear the code using an OBDII scanner, it is crucial to address the underlying problem causing the P2135 code to prevent it from reoccurring and potentially causing further damage.

8. Are there any preventative maintenance tips to avoid the P2135 code in a GMC Sierra?

Regularly inspecting and cleaning the throttle body, checking the throttle position sensor for any signs of wear, and ensuring proper wiring connections can help prevent issues that trigger the P2135 code.

9. Can a DIY enthusiast without extensive automotive experience fix the P2135 code in a GMC Sierra?

Depending on the root cause of the P2135 code, some repairs like cleaning the throttle body or checking wiring connections may be manageable for a DIY enthusiast. However, sensor replacements or complex electrical issues may require professional assistance.

10. How much can I expect to pay for repairing the P2135 code in a 2017 GMC Sierra?

The cost of repairing the P2135 code can vary significantly based on the exact cause of the issue and whether you choose to address it yourself or take it to a professional mechanic. Costs may range from a few dollars for cleaning supplies to a few hundred dollars for sensor replacements or complex repairs.