P100E 2018 GMC Sierra Code - Accelerator Pedal Position Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. 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
- P100E 2018 GMC Sierra indicates Accelerator Pedal Position Signal Message Counter Incorrect.
- 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.
Code P100E 2018 GMC Sierra Description
What are the Possible Causes of the DTC P100E 2018 GMC Sierra?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
How to Fix the DTC P100E 2018 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P100E 2018 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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Frequently Asked Questions about P100E 2018 GMC Sierra Code
1. What does the OBDII code P100E mean on a 2018 GMC Sierra?
P100E indicates that the Accelerator Pedal Position (APP) signal message counter is incorrect, often due to a communication mismatch between the pedal and the engine control module (ECM).
2. What are the common symptoms of code P100E in a 2018 GMC Sierra?
Symptoms may include reduced engine performance, activation of the check engine light, unresponsive acceleration, or the vehicle entering "limp mode."
3. What causes the P100E code on a GMC Sierra?
Common causes include a malfunctioning accelerator pedal position sensor, wiring issues in the APP circuit, software glitches in the ECM, or connector problems.
4. Can I still drive my 2018 GMC Sierra with the P100E code?
Driving with this code is not recommended, as it may lead to unsafe conditions like limited acceleration or sudden loss of power.
5. How can I fix the P100E code on my 2018 GMC Sierra?
Potential fixes include inspecting and repairing faulty wiring or connectors, replacing the accelerator pedal position sensor, and updating or reprogramming the ECM if needed.
6. How do I know if the accelerator pedal position sensor is faulty?
A faulty sensor may cause inconsistent throttle response, hesitation during acceleration, or the P100E code to trigger.
7. Can a dirty throttle body cause the P100E code?
A dirty throttle body is unlikely to cause this specific code, as it relates to the signal message counter in the APP circuit, not airflow issues.
8. Do I need to replace the ECM to fix code P100E?
Replacing the ECM is rarely necessary. First, troubleshoot the APP sensor, wiring, and connectors. Reprogramming the ECM may resolve the issue without replacing it.
9. How much does it cost to repair the P100E code on a 2018 GMC Sierra?
Repair costs can range from $100 to $500, depending on whether the accelerator pedal sensor needs replacing or if ECM reprogramming is required.
10. Can a loose connector cause the P100E code?
Yes, a loose or damaged connector in the APP circuit can disrupt communication and trigger the P100E code. Always inspect connectors during diagnosis.
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