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Engine-Codes – GMC – P100E 2015 GMC Sierra

P100E 2015 GMC Sierra Code - Accelerator Pedal Position Signal Message Counter Incorrect

Quick Answer

The diagnostic trouble code P100E for a 2015 GMC Sierra indicates that the Accelerator Pedal Position Signal Message Counter is incorrect. Common causes include Faulty accelerator pedal position sensor, Wiring issues or corrosion in the sensor circuit, Malfunctioning ECM. 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
P100E 2015 GMC Sierra indicates Accelerator Pedal Position Signal Message Counter Incorrect.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring issues or corrosion in the sensor circuit, Malfunctioning ECM.
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 17, 2024
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Code P100E 2015 GMC Sierra Description

The diagnostic trouble code P100E for a 2015 GMC Sierra indicates that the Accelerator Pedal Position Signal Message Counter is incorrect. This means that the vehicle's Engine Control Module (ECM) is receiving an inaccurate signal from the accelerator pedal position sensor. The accelerator pedal position sensor is responsible for sending the ECM information about how far the driver is pressing the accelerator pedal, which in turn helps the ECM adjust fuel delivery and ignition timing to optimize engine performance.

OBDII Code P100E 2015 GMC Sierra - Accelerator Pedal Position Signal Message Counter Incorrect
P100E 2015 GMC Sierra Code - Accelerator Pedal Position Signal Message Counter Incorrect

Common Causes of P100E 2015 GMC Sierra

  1. Faulty accelerator pedal position sensor
  2. Wiring issues or corrosion in the sensor circuit
  3. Malfunctioning ECM
  4. Software glitches in the ECM's programming
  5. Poor electrical connection between the sensor and ECM

Symptoms of P100E 2015 GMC Sierra

  1. Engine hesitation or lack of response when accelerating
  2. Poor engine performance
  3. Reduced fuel efficiency
  4. Engine stalling
  5. Check Engine Light illuminated on the dashboard

How to Fix P100E 2015 GMC Sierra

  1. Begin by diagnosing the issue using a scan tool to confirm the P100E code and identify the specific cause of the incorrect signal.
  2. Inspect the accelerator pedal position sensor and its wiring for any damage, corrosion, or loose connections. Replace or repair as necessary.
  3. Check the ECM for any signs of malfunction or software glitches. Update the ECM software if needed or replace the ECM if it is faulty.
  4. Clear the trouble code from the ECM's memory and test drive the vehicle to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the incorrect signal.

Cost to Fix P100E 2015 GMC Sierra

The typical repair costs for addressing a P100E code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty accelerator pedal position sensor can cost between $100 and $200, while repairing wiring issues or corrosion may range from $50 to $150. If the ECM needs to be replaced, this can be a more expensive repair, with costs ranging from $300 to $800 or more. Labor costs at auto repair shops typically range from $80 to $150 per hour, so the total repair bill can add up quickly. It's advisable to check with local auto repair shops for more accurate estimates based on your specific location and vehicle.

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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 P100E 2015 GMC Sierra Code

1. What does the OBDII code P100E mean on a 2015 GMC Sierra?

The P100E code indicates an issue with the Accelerator Pedal Position (APP) signal message counter being incorrect, often related to communication or signal errors between the pedal and the engine control module (ECM).

2. What are the common symptoms of the P100E code?

Symptoms may include reduced engine power, the check engine light illuminating, poor throttle response, or the vehicle entering "limp" mode.

3. What causes the P100E code to appear?

The code can be triggered by a faulty accelerator pedal position sensor, wiring or connector issues, or a software/communication error in the ECM.

4. Can I drive with the P100E code active?

Driving with this code may be possible, but it’s not recommended as reduced power mode can limit performance and create unsafe driving conditions.

5. How do you diagnose the P100E code?

A technician will use a scan tool to confirm the code, inspect the accelerator pedal position sensor and its wiring, and check for any related communication issues in the ECM.

6. How can the P100E code be fixed?

Repairs may involve replacing the accelerator pedal position sensor, repairing or replacing damaged wiring, or reprogramming/updating the ECM.

7. How much does it cost to repair the P100E code on a 2015 GMC Sierra?

The cost can range from $100 to $500 depending on whether the sensor, wiring, or ECM requires repair or replacement.

8. Can a software update fix the P100E code?

Yes, in some cases, a software update or reprogramming of the ECM may resolve the issue if it is related to a communication error.

9. What tools are needed to troubleshoot the P100E code?

Troubleshooting requires a diagnostic scan tool, a multimeter for checking electrical connections, and possibly a wiring diagram for the accelerator pedal circuit.

10. Can a dirty throttle body cause the P100E code?

A dirty throttle body itself is unlikely to cause this specific code, but it can contribute to poor throttle response, which might confuse the diagnostic process.

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