AutoCodes – Saturn – P1AA8 Saturn

P1AA8 Saturn Code - Starter/Generator Field Control Performance

Quick Answer

The Starter/Generator Control Module (SGCM) monitors the Motor Generator Unit (MGU) field coil circuit to see if the field coil current is within tolerance. 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: P1AA8 Saturn indicates Starter/Generator Field Control 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 803

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 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1AA8 Saturn Description

The Starter/Generator Control Module (SGCM) monitors the Motor Generator Unit (MGU) field coil circuit to see if the field coil current is within tolerance.

OBDII Code P1AA8 Saturn - Starter/Generator Field Control Performance - AutoCodes.com — P1AA8 Saturn Code - Starter/Generator Field Control Performance

What does this mean?

What are the Possible Causes of the DTC P1AA8 Saturn?

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 P1AA8 Saturn?

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 P1AA8 Saturn 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 P1AA8 Saturn code?

Need more information on how to fix the P1AA8 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1AA8 Saturn 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 P1AA8 Saturn Code

1. What are the common symptoms of OBDII code P1AA8 Saturn (Starter/Generator Field Control Performance)?

Symptoms may include rough engine idle, reduced power steering assistance, and the vehicle failing to start.

2. What are the possible causes of OBDII code P1AA8 Saturn?

Potential causes include a faulty starter/generator, damaged wiring or connectors, low battery voltage, or issues with the powertrain control module (PCM).

3. How can I diagnose the OBDII code P1AA8 Saturn?

Diagnosis typically involves using a scan tool to read the code, checking the battery voltage, inspecting the starter/generator and related components, and testing the wiring for any faults.

4. Can I still drive my vehicle with OBDII code P1AA8 Saturn?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially leave you stranded.

5. How do I repair OBDII code P1AA8 Saturn?

Repair options may include replacing the starter/generator, repairing any damaged wiring, ensuring proper battery voltage, and resetting the code with a scan tool after the repair is completed.

6. Is it safe to reset the OBDII code P1AA8 Saturn without fixing the underlying issue?

Resetting the code without addressing the root cause can lead to the problem recurring and potentially causing further damage to the vehicle.

7. Can a DIY enthusiast fix OBDII code P1AA8 Saturn at home?

While some basic diagnostics can be done at home, fixing this code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

8. What is the typical cost to repair OBDII code P1AA8 Saturn?

Costs can vary depending on the exact cause of the issue, but expect to pay for parts and labor, which can range from a few hundred to over a thousand dollars.

9. How long does it take to repair OBDII code P1AA8 Saturn?

The repair time can vary based on the extent of the issue and the availability of parts, but it may take a few hours to a full day to complete the repair.

10. Can OBDII code P1AA8 Saturn be prevented in the future?

Regular maintenance, such as checking the battery health, inspecting the starter/generator, and addressing any electrical issues promptly, can help prevent this code from recurring.