AutoCodes – GMC – P1A62 GMC

P1A62 GMC Code - Starter/Generator Control Module Torque Delivered Performance

Quick Answer

The Starter/Generator Control Module (SGCM) monitors the internal torque value and compares it to the Motor Generator Unit (MGU) delivered torque value. Common causes include Faulty Motor Generator Unit (MGU), Motor Generator Unit (MGU) harness is open or shorted, Motor Generator Unit (MGU) 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: P1A62 GMC indicates Starter/Generator Control Module Torque Delivered Performance.
Common causes: Common causes include Faulty Motor Generator Unit (MGU), Motor Generator Unit (MGU) harness is open or shorted, Motor Generator Unit (MGU) 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.

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Code Popularity 839

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 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A62 GMC Description

The Starter/Generator Control Module (SGCM) monitors the internal torque value and compares it to the Motor Generator Unit (MGU) delivered torque value. If the delivered torque is not within tolerance, the code will set.

OBDII Code P1A62 GMC - Starter/Generator Control Module Torque Delivered Performance - AutoCodes.com — P1A62 GMC Code - Starter/Generator Control Module Torque Delivered Performance

What does this mean?

What are the Possible Causes of the DTC P1A62 GMC?

Faulty Motor Generator Unit (MGU)
Motor Generator Unit (MGU) harness is open or shorted
Motor Generator Unit (MGU) circuit poor electrical connection

How to Fix the DTC P1A62 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 P1A62 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.

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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 P1A62 GMC Code

1. What does the OBDII code P1A62 mean on a GMC vehicle?

P1A62 indicates an issue with the Starter/Generator Control Module (SGCM) related to torque delivered performance, meaning the module is not providing the expected torque output.

2. What are common symptoms of the P1A62 code in a GMC?

Symptoms include reduced engine performance, poor acceleration, a decrease in fuel efficiency, and the illumination of the Check Engine Light or other warning lights.

3. What causes the P1A62 code to trigger?

Common causes include a malfunctioning Starter/Generator Control Module, wiring or connector issues, sensor failures, or software glitches in the module.

4. Can I drive my GMC with the P1A62 code active?

Driving with the P1A62 code is not recommended as it may lead to further damage to the starter/generator system and reduced vehicle performance.

5. How is the P1A62 code diagnosed?

A technician will use a scan tool to read the code, inspect the SGCM, check for wiring or connector damage, and test the system's torque output performance.

6. What are the most common fixes for the P1A62 code?

Repairs may involve replacing the Starter/Generator Control Module, repairing damaged wiring or connectors, updating the moduleâ€™s software, or recalibrating the system.

7. How much does it cost to fix the P1A62 code on a GMC?

Repair costs can range from $200 to $1,500, depending on whether the issue is a minor wiring fix or requires replacing the SGCM.

8. Can a software update resolve the P1A62 code?

Yes, in some cases, updating the Starter/Generator Control Module software can resolve the issue if it is caused by a software glitch.

9. How can I prevent the P1A62 code from reoccurring?

Regular maintenance, ensuring wiring connections are secure, and addressing any warning lights promptly can help prevent the code from reappearing.

10. Does the P1A62 code affect hybrid GMC vehicles differently?

Yes, in hybrid GMC models, this code can significantly impact the performance of the electric drive system, leading to reduced efficiency and drivability.