AutoCodes – GMC – P2127 2015 GMC Sierra

P2127 2015 GMC Sierra Code - Accelerator Pedal Position Sensor 2 Circuit Low Voltage

Quick Answer

The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor 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: P2127 2015 GMC Sierra indicates Accelerator Pedal Position Sensor 2 Circuit Low Voltage.
Common causes: Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor 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 515

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 Sep 08, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2127 2015 GMC Sierra Description

The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. The APP sensors are mounted to the accelerator pedal assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to the pedal position. The Engine Control Module (ECM) supplies each APP sensor with a 5 V reference circuit, a low reference circuit, and a signal circuit.
Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when fully depressed.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the APP sensor 2 voltage is less than 0.32 V for less than 1 s.

OBDII Code P2127 2015 GMC Sierra - Accelerator Pedal Position Sensor 2 Circuit Low Voltage - AutoCodes.com — P2127 2015 GMC Sierra Code - Accelerator Pedal Position Sensor 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2127 2015 GMC Sierra?

Faulty Accelerator Pedal Position Sensor
Accelerator Pedal Position Sensor harness is open or shorted
Accelerator Pedal Position Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2127 2015 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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2127 2015 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 P2127 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2127 in a 2015 GMC Sierra?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the Check Engine light coming on.

2. What does the OBDII code P2127 on a 2015 GMC Sierra indicate?

- OBDII code P2127 indicates an issue with the Accelerator Pedal Position Sensor 2 Circuit registering low voltage.

3. What are the possible causes of OBDII code P2127 in a 2015 GMC Sierra?

- Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the vehicle's ECM.

4. How can I diagnose the cause of OBDII code P2127 in my 2015 GMC Sierra?

- Diagnosis typically involves checking the sensor's wiring and connectors for damage, testing the sensor's voltage output, and scanning the vehicle's ECM for related error codes.

5. Can driving with OBDII code P2127 in a 2015 GMC Sierra cause further damage?

- Continuing to drive with this code may result in reduced engine performance and potential issues with acceleration, so it is recommended to address the problem promptly.

6. Is it safe to continue driving my 2015 GMC Sierra with OBDII code P2127?

- It is generally not recommended to continue driving with this code as it can impact the vehicle's performance and potentially lead to unsafe driving conditions.

7. How can I repair OBDII code P2127 on my 2015 GMC Sierra?

- Repair typically involves replacing the faulty Accelerator Pedal Position Sensor 2, repairing damaged wiring or connectors, and clearing the error code with a diagnostic tool.

8. Can I fix OBDII code P2127 in my 2015 GMC Sierra myself?

- While some DIY enthusiasts may be able to replace the sensor or check the wiring, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

9. How much does it cost to repair OBDII code P2127 in a 2015 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from $100 to $300 or more.

10. How long does it take to repair OBDII code P2127 in a 2015 GMC Sierra?

- The repair time can vary based on the extent of the issue and the availability of parts, but it typically takes a few hours to complete the necessary repairs.