AutoCodes – GMC – P1A6C GMC

P1A6C GMC Code - SGCM Service Calibration Fault

Quick Answer

The internal fault detection is handled inside the control module. Common causes include Starter Generator Control Module (SGCM) Program, Faulty Starter Generator Control Module (SGCM), Starter Generator Control Module (SGCM) harness is open or shorted. 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
P1A6C GMC indicates SGCM Service Calibration Fault.
Common causes
Common causes include Starter Generator Control Module (SGCM) Program, Faulty Starter Generator Control Module (SGCM), Starter Generator Control Module (SGCM) harness is open or shorted.
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 984
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Feb 21, 2020
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Code P1A6C GMC Description

The internal fault detection is handled inside the control module. No external circuits are involved. This code indicates that the Energy Storage Control Module (ESCM), Starter Generator Control Module (SGCM) or Heating Control Module (HCM) has not yet been programmed with latest production software.
OBDII Code P1A6C GMC - SGCM Service Calibration Fault - AutoCodes.com
P1A6C GMC Code - SGCM Service Calibration Fault

What are the Possible Causes of the DTC P1A6C GMC?

  • Starter Generator Control Module (SGCM) Program
  • Faulty Starter Generator Control Module (SGCM)
  • Starter Generator Control Module (SGCM) harness is open or shorted
  • Starter Generator Control Module (SGCM) circuit poor electrical connection

How to Fix the DTC P1A6C 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 P1A6C 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 P1A6C GMC code?

Need more information on how to fix the P1A6C GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A6C GMC code diagnosed by a professional: Find a repair shop in your area

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 P1A6C GMC Code

1. What are the common symptoms of an OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- Common symptoms include poor vehicle performance, decreased fuel efficiency, and illuminated check engine light.

2. What are the possible causes of the OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- The code may be triggered by issues with the SGCM (Secondary Gateway Control Module), wiring faults, software glitches, or faulty components.

3. How can I diagnose an OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- Diagnosis involves using a diagnostic scanner to retrieve the code, checking for other related codes, and conducting a thorough inspection of the SGCM system.

4. Are there any common repair tips for resolving the OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- Common repair tips include checking and repairing wiring issues, updating software if available, and replacing any faulty SGCM components.

5. Can I drive my vehicle with an OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- It is not recommended to drive the vehicle with this fault, as it can lead to further damage and potential safety risks.

6. How much does it typically cost to repair an OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- The cost of repair can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars.

7. Is it possible to reset the OBDII code P1A6C GMC (SGCM Service Calibration Fault) without repairing the issue?

- Resetting the code without addressing the underlying problem will only temporarily turn off the check engine light and the fault may reoccur.

8. Can a DIY enthusiast fix the OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code themselves.

9. How long does it take to repair an OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- The repair time can vary based on the specific issue, but it may take anywhere from a few hours to a full day at a repair shop.

10. Are there any recalls related to the OBDII code P1A6C GMC (SGCM Service Calibration Fault)?

- It is recommended to check with GMC or relevant authorities to see if there are any recalls related to this specific fault code.

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