AutoCodes – GMC – P1AA2 GMC

P1AA2 GMC Code - Starter/Generator Inverter Phase V Overtemperature

Quick Answer

The Power Inverter Module (PIM) temperature 1 and 2 sensors are used for overheat protection. 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: P1AA2 GMC indicates Starter/Generator Inverter Phase V Overtemperature.
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 1,058

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1AA2 GMC Description

The Power Inverter Module (PIM) temperature 1 and 2 sensors are used for overheat protection. The thermistors are located on the control board, near the phase U or V power MOSFET. The Starter/Generator Control Module (SGCM) monitors the inverter temperature sensor for the following:
To detect if the inverter phase U or V temperature sensor is shorted low.
To detect if the inverter phase U or V temperature sensor is shorted high.

OBDII Code P1AA2 GMC - Starter/Generator Inverter Phase V Overtemperature - AutoCodes.com — P1AA2 GMC Code - Starter/Generator Inverter Phase V Overtemperature

What does this mean?

What are the Possible Causes of the DTC P1AA2 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 P1AA2 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 P1AA2 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 P1AA2 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 P1AA2 GMC Code

1. What are the common symptoms of OBDII code P1AA2 GMC (Starter/Generator Inverter Phase V Overtemperature)?

The common symptoms include the illumination of the Check Engine Light (CEL), decreased fuel efficiency, and potential issues with the vehicle's starting and charging systems.

2. What can cause the OBDII code P1AA2 GMC to trigger?

This code is typically triggered by the starter/generator inverter phase V reaching an overtemperature condition, often due to a malfunction in the inverter system or poor cooling.

3. How serious is the OBDII code P1AA2 GMC?

While the code itself may not cause immediate harm to the vehicle, it can lead to performance issues and potential damage to the inverter system if left unresolved.

4. How can I diagnose the OBDII code P1AA2 GMC?

Diagnosing this code usually involves using a diagnostic scanner to read the code, checking for any visible signs of damage or overheating in the inverter system, and performing relevant tests on the components involved.

5. What are some repair tips for addressing OBDII code P1AA2 GMC?

Repair tips may include checking and repairing any damaged wiring, ensuring proper cooling for the inverter system, and potentially replacing faulty components contributing to the overtemperature condition.

6. Can I continue driving with the OBDII code P1AA2 GMC present?

It is not recommended to continue driving with this code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

7. Are there any recalls or technical service bulletins related to OBDII code P1AA2 GMC?

Check with your local GMC dealership or online resources for any relevant recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or solutions.

8. How much can I expect to pay to repair OBDII code P1AA2 GMC?

The cost of repairs can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It's recommended to get a diagnosis from a qualified mechanic for an accurate estimate.

9. Can I reset the OBDII code P1AA2 GMC on my own?

While you can attempt to clear the code using an OBDII scanner, it's important to address the underlying issue causing the code to prevent it from reoccurring.

10. How can I prevent OBDII code P1AA2 GMC from appearing in the future?

Regular maintenance, proper cooling system checks, and addressing any warning signs promptly can help prevent the overtemperature condition that triggers this code.