AutoCodes – GMC – P100A GMC

P100A GMC Code - Turbocharger Boost Control 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 Turbocharger Boost Control. 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: P100A GMC indicates Turbocharger Boost Control Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Turbocharger Boost Control.
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 807

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P100A GMC Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Turbocharger Boost Control Signal Message Counter is Incorrect.

OBDII Code P100A GMC - Turbocharger Boost Control Signal Message Counter Incorrect - AutoCodes.com — P100A GMC Code - Turbocharger Boost Control Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P100A GMC?

Faulty Turbocharger Boost Control

How to Fix the DTC P100A GMC?

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 P100A GMC 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.

Need more information about the P100A GMC code?

Need more information on how to fix the P100A GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P100A GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P100A 2014 GMC Sierra — Turbocharger Boost Control Signal Message Counter Incorrect
P100A 2015 GMC Sierra — Turbocharger Boost Control Signal Message Counter Incorrect
P100A 2016 GMC Sierra — Turbocharger Boost Control Signal Message Counter Incorrect
P100A 2017 GMC Sierra — Turbocharger Boost Control Signal Message Counter Incorrect
P100A 2018 GMC Sierra — Turbocharger Boost Control Signal Message Counter Incorrect

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 P100A GMC Code

1. What are the common symptoms of OBDII code P100A in a GMC vehicle?

- Common symptoms include reduced engine power, poor acceleration, and the vehicle going into limp mode.

2. What does the OBDII code P100A in a GMC indicate?

- The code P100A indicates that the turbocharger boost control signal message counter is incorrect.

3. What are the possible causes of OBDII code P100A in a GMC?

- Possible causes include a faulty turbocharger boost control sensor, wiring issues, or a defective electronic control module (ECM).

4. How can I diagnose the OBDII code P100A in my GMC vehicle?

- Diagnosis typically involves inspecting the turbocharger boost control system, checking for damaged wiring, and using a scan tool to monitor sensor data.

5. Can I continue driving my GMC with the OBDII code P100A present?

- It is not recommended to drive the vehicle with the P100A code active, as it can lead to further damage and potential safety issues.

6. How can I repair the OBDII code P100A in my GMC?

- Repair options may include replacing the turbocharger boost control sensor, repairing any damaged wiring, or reprogramming the ECM.

7. Is it necessary to reset the OBDII code P100A after making repairs?

- Yes, it is important to clear the code using a scan tool after making any necessary repairs to reset the system and ensure the issue has been resolved.

8. Can a DIY enthusiast fix the OBDII code P100A in a GMC?

- While some repairs related to this code can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it typically cost to repair the OBDII code P100A in a GMC?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.

10. How can I prevent the OBDII code P100A from appearing in my GMC in the future?

- Regular maintenance, such as checking the turbocharger system, ensuring proper wiring connections, and using quality fuel, can help prevent the recurrence of the P100A trouble code.