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Engine-Codes – GMC – P100E 2017 GMC Sierra

P100E 2017 GMC Sierra Code - Accelerator Pedal Position Signal Message Counter Incorrect

Quick Answer

The P100E diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Accelerator Pedal Position Signal Message Counter is Incorrect. Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, ECM software malfunction. 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 2017 GMC Sierra indicates Accelerator Pedal Position Signal Message Counter Incorrect.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the accelerator pedal position sensor circuit, ECM software malfunction.
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 2017 GMC Sierra Description

The P100E diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Accelerator Pedal Position Signal Message Counter is Incorrect. This code typically means that the Engine Control Module (ECM) has detected a discrepancy in the number of messages being sent by the accelerator pedal position sensor. The accelerator pedal position sensor is responsible for sending signals to the ECM to indicate how much throttle input the driver is requesting. When the message counter is incorrect, it can lead to issues with engine performance, fuel efficiency, and overall drivability.

OBDII Code P100E 2017 GMC Sierra - Accelerator Pedal Position Signal Message Counter Incorrect
P100E 2017 GMC Sierra Code - Accelerator Pedal Position Signal Message Counter Incorrect

Common Causes of P100E 2017 GMC Sierra

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the accelerator pedal position sensor circuit
  3. ECM software malfunction
  4. Electronic interference or noise affecting sensor signals
  5. Mechanical issues with the accelerator pedal assembly

Symptoms of P100E 2017 GMC Sierra

  1. Reduced engine power
  2. Hesitation during acceleration
  3. Stalling
  4. Check Engine Light illuminated
  5. Poor fuel efficiency

How to Fix P100E 2017 GMC Sierra

  1. Begin by conducting a thorough inspection of the accelerator pedal position sensor, wiring, and connectors for any visible damage or corrosion.
  2. Test the accelerator pedal position sensor using a multimeter to ensure it is functioning correctly.
  3. Check for any software updates for the ECM and perform a reflash if necessary.
  4. If no issues are found with the sensor or wiring, consider checking for any electronic interference that may be affecting the signal.
  5. If the issue persists, it may be necessary to replace the accelerator pedal assembly or have the ECM reprogrammed by a professional technician.

Cost to Fix P100E 2017 GMC Sierra

The cost of repairing a P100E code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for a new accelerator pedal position sensor can range from $50 to $150, while labor costs can range from $100 to $200. Overall, the total repair cost can be estimated to be between $150 and $350. It is important to note that these are rough estimates, and actual costs may vary based on the location, labor rates, and any additional diagnostics or repairs needed. It is recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate.

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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 2017 GMC Sierra Code

1. What does the OBDII code P100E mean on a 2017 GMC Sierra?

P100E indicates that the accelerator pedal position (APP) signal message counter is incorrect, meaning the electronic throttle control system detected mismatched or invalid data from the APP sensor.

2. What are the common symptoms of code P100E in a 2017 GMC Sierra?

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

3. What causes the P100E code in a 2017 GMC Sierra?

Common causes include a faulty APP sensor, damaged wiring or connectors in the accelerator pedal circuit, or issues with the powertrain control module (PCM).

4. Can I drive my 2017 GMC Sierra with the P100E code?

Driving with code P100E is not recommended, as it can lead to reduced performance and safety risks due to limited throttle response and potential loss of power.

5. How do I fix the P100E code on a 2017 GMC Sierra?

Repair solutions include inspecting and repairing damaged wiring or connectors, replacing the accelerator pedal assembly (if the APP sensor is faulty), or updating/reprogramming the PCM if needed.

6. How do I diagnose the P100E code on a 2017 GMC Sierra?

Diagnosis involves scanning for additional codes, inspecting the APP sensor and its wiring, checking for proper voltage and ground at the sensor, and using a scan tool to monitor APP signal data.

7. Is the P100E code related to the throttle body on a 2017 GMC Sierra?

While P100E specifically refers to the APP sensor, issues with the throttle body or its wiring can sometimes cause similar symptoms and should be inspected if other components check out.

8. What tools are needed to fix the P100E code on a 2017 GMC Sierra?

You’ll need an OBDII scanner, a multimeter to check electrical connections, and basic hand tools for component inspection and replacement.

9. How much does it cost to repair the P100E code on a 2017 GMC Sierra?

The cost varies depending on the issue. Replacing an APP sensor or pedal assembly typically costs $150–$300, while PCM reprogramming or wiring repairs may add to the cost.

10. Can a software update fix the P100E code on a 2017 GMC Sierra?

Yes, in some cases, a PCM software update may resolve the issue if the code is caused by outdated or corrupted programming.

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