AutoCodes – GMC – P0A01 GMC

P0A01 GMC Code - Starter/Generator Control Module Coolant Temperature Sensor 1 Performance

Quick Answer

The Starter/Generator Control Module (SGCM) monitors its internal fluid temperature sensors to control the SGCM coolant pump and SGCM cooling fan. Common causes include 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. 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: P0A01 GMC indicates Starter/Generator Control Module Coolant Temperature Sensor 1 Performance.
Common causes: Common causes include 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.
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 1,139

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0A01 GMC Description

The Starter/Generator Control Module (SGCM) monitors its internal fluid temperature sensors to control the SGCM coolant pump and SGCM cooling fan. The internal fluid temperature sensors of the SGCM are thermistors and are not serviceable. When the internal fluid temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the internal fluid temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The input parameters are not displayed on the scan tool.

OBDII Code P0A01 GMC - Starter/Generator Control Module Coolant Temperature Sensor 1 Performance - AutoCodes.com — P0A01 GMC Code - Starter/Generator Control Module Coolant Temperature Sensor 1 Performance

What does this mean?

What are the Possible Causes of the DTC P0A01 GMC?

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 P0A01 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 P0A01 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 P0A01 GMC 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 P0A01 GMC Code

1. What are the common symptoms of OBDII code P0A01 in a GMC related to the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

The common symptoms include poor engine performance, reduced fuel efficiency, and potential stalling or starting issues.

2. What are the possible causes of OBDII code P0A01 in a GMC indicating an issue with the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

Possible causes include a faulty coolant temperature sensor, wiring issues, a malfunctioning starter/generator control module, or low coolant levels.

3. How can I diagnose the cause of OBDII code P0A01 in my GMC related to the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

You can diagnose the issue by using an OBDII scanner to retrieve the specific fault code, checking the coolant temperature sensor for proper operation, inspecting the wiring for any damage, and testing the starter/generator control module.

4. Are there any simple repair tips for addressing OBDII code P0A01 in a GMC associated with the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

One simple repair tip is to first ensure that the coolant level is adequate and then proceed to inspect and potentially replace the coolant temperature sensor if necessary.

5. Can OBDII code P0A01 in a GMC related to the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance be fixed at home?

Depending on your mechanical expertise, you may be able to fix the issue at home by replacing the faulty coolant temperature sensor or addressing any wiring issues. However, more complex problems with the starter/generator control module may require professional assistance.

6. What are the potential risks of ignoring OBDII code P0A01 in a GMC indicating a problem with the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

Ignoring this code can lead to further engine performance issues, reduced fuel efficiency, and potential damage to the starter/generator system, resulting in more costly repairs down the line.

7. Is it safe to continue driving my GMC with OBDII code P0A01 related to the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

It is not recommended to continue driving your GMC with this fault code present, as it can lead to unpredictable engine behavior and potential breakdowns. It's best to address the issue promptly.

8. How much does it typically cost to repair OBDII code P0A01 in a GMC associated with the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

The cost of repair can vary depending on the exact cause of the issue. Replacing a faulty coolant temperature sensor may range from $50 to $150, while addressing problems with the starter/generator control module could be more expensive, potentially costing several hundred dollars.

9. Can a DIY enthusiast with basic tools and knowledge fix OBDII code P0A01 in a GMC related to the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

Yes, a DIY enthusiast with basic tools and knowledge may be able to address simpler issues like replacing the coolant temperature sensor. However, more complex problems with the starter/generator control module may require specialized tools and expertise.

10. How long does it typically take to repair OBDII code P0A01 in a GMC associated with the Starter/Generator Control Module Coolant Temperature Sensor 1 Performance?

The repair time can vary depending on the specific issue and the level of expertise. Simple repairs like replacing the coolant temperature sensor may take an hour or two, while more complex problems could require several hours or even a day to diagnose and fix.