AutoCodes – Chevrolet – P1AAF Chevrolet

P1AAF Chevrolet Code - Starter/Generator Phase U-V-W Circuit

Quick Answer

The Starter/Generator Control Module (SGCM) unit is an electronic device that works in conjunction with the electrical subsystem to efficiently perform DC/DC and DC/AC electrical energy conversion and support vehicle functions. 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: P1AAF Chevrolet indicates Starter/Generator Phase U-V-W Circuit.
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 992

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 P1AAF Chevrolet Description

The Starter/Generator Control Module (SGCM) unit is an electronic device that works in conjunction with the electrical subsystem to efficiently perform DC/DC and DC/AC electrical energy conversion and support vehicle functions.
This SGCM will have 2 functions. The first will be monitoring, where the DC voltage is transformed into 3-phase A/C power to the Starter Generator interface. In this case, energy flows from battery 36-volt to Phase 1, Phase 2, Phase 3. The second case will be generating, where the 3-phase A/C power is used to charge the 36 V battery pack. In this case, energy flows from Phase 1, Phase 2, Phase 3 to battery 36-volt. If the values of Starter Generator Speed and Starter Generator Torque are zero, then the Starter Generator Control will be disabled and the Starter Generator Inverter is not transferring or consuming any power.
3-Phase A/C Current will be defined as the current value of Phase 1. The current will be bidirectional, with positive representing discharging the batteries and negative representing charging the batteries.

OBDII Code P1AAF Chevrolet - Starter/Generator Phase U-V-W Circuit - AutoCodes.com — P1AAF Chevrolet Code - Starter/Generator Phase U-V-W Circuit

What does this mean?

What are the Possible Causes of the DTC P1AAF Chevrolet?

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 P1AAF Chevrolet?

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 P1AAF Chevrolet 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 P1AAF Chevrolet Code

1. What are the common symptoms of OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Common symptoms include issues with starting the vehicle, reduced engine power, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Possible causes include faulty wiring connections, damaged components in the phase U-V-W circuit, or a malfunctioning starter/generator unit.

3. How can I diagnose OBDII code P1AAF in my Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the wiring and connections in the phase U-V-W circuit, and testing the starter/generator unit.

4. Can I still drive my Chevrolet with OBDII code P1AAF related to the Starter/Generator Phase U-V-W Circuit?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

5. What are some repair tips for fixing OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty components in the phase U-V-W circuit, or replacing the starter/generator unit if necessary.

6. How much does it typically cost to repair OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Repair costs can vary depending on the extent of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

7. Are there any safety precautions to consider when working on OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- It is important to disconnect the vehicle's battery before working on any electrical components, and to follow proper safety procedures outlined in the vehicle's service manual.

8. How long does it typically take to repair OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit?

- Repair times can vary depending on the specific issue, but it may take a few hours to a full day to diagnose and repair the problem.

9. Can OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit cause damage to other vehicle components if left unrepaired?

- Yes, if left unrepaired, this code can potentially cause damage to other electrical components in the vehicle and lead to more costly repairs down the line.

10. Is it possible to reset OBDII code P1AAF in a Chevrolet related to the Starter/Generator Phase U-V-W Circuit without fixing the underlying issue?

- While it is possible to clear the code using a diagnostic scanner, it is not recommended as the issue causing the code will persist and may lead to further problems.