AutoCodes – Buick – P1A6C Buick

P1A6C Buick 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 Buick 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 905

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 Feb 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A6C Buick 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 Buick - SGCM Service Calibration Fault - AutoCodes.com — P1A6C Buick Code - SGCM Service Calibration Fault

What does this mean?

What are the Possible Causes of the DTC P1A6C Buick?

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 Buick?

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 Buick 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 Buick code?

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

Need Help with the Code?

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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 P1A6C Buick Code

1. What does the OBDII code P1A6C mean on a Buick?

P1A6C indicates a "SGCM Service Calibration Fault," which refers to an issue with the Stored Energy Control Module's calibration data being invalid or corrupted.

2. What are the common symptoms of the P1A6C code on a Buick?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited power output, or issues with hybrid or electric system performance in applicable models.

3. What causes the P1A6C code to appear on a Buick?

Possible causes include corrupted calibration data in the SGCM, software issues, a failed control module, or communication errors between the module and other components.

4. Can I drive my Buick with the P1A6C code active?

Itâ€™s not recommended to drive with this code active, as it could affect the vehicleâ€™s performance and potentially lead to further system damage.

5. How is the P1A6C code diagnosed on a Buick?

A technician will use a diagnostic scanner to confirm the code, check the calibration status of the SGCM, and inspect for software updates, wiring issues, or module malfunctions.

6. Can the P1A6C code be fixed with a software update?

Yes, in some cases, reprogramming or updating the SGCM software with the latest calibration data can resolve the issue.

7. What repairs are typically needed for the P1A6C code?

Repairs may include reprogramming the SGCM, replacing the module if itâ€™s faulty, or repairing damaged wiring or connectors.

8. How much does it cost to fix the P1A6C code on a Buick?

The cost can vary, but reprogramming the SGCM typically ranges from $150-$300, while module replacement could cost $500 or more, depending on parts and labor.

9. Can a weak battery cause the P1A6C code?

Yes, a weak or failing battery can sometimes lead to calibration data corruption, which may trigger the P1A6C code.

10. How can I prevent the P1A6C code from occurring again?

Keep your vehicleâ€™s battery in good condition, ensure software updates are performed during regular service, and address any electrical issues promptly.