AutoCodes – GMC – P1AB7 GMC

P1AB7 GMC Code - Starter/Generator Phase W Current Sensor Circuit Low Voltage

Quick Answer

The Starter/Generator Control Module (SGCM) phase U/V/W current sensors are used for motor control and power inverter module (PIM) current sensor rationality check. 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: P1AB7 GMC indicates Starter/Generator Phase W Current Sensor Circuit Low Voltage.
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 924

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 P1AB7 GMC Description

The Starter/Generator Control Module (SGCM) phase U/V/W current sensors are used for motor control and power inverter module (PIM) current sensor rationality check. The SGCM monitors the current sensor for the following:
- To detect a failure of the U/V/W-phase current sensor circuit below valid range.
- To detect a failure of the U/V/W-phase current sensor circuit above valid range.

OBDII Code P1AB7 GMC - Starter/Generator Phase W Current Sensor Circuit Low Voltage - AutoCodes.com — P1AB7 GMC Code - Starter/Generator Phase W Current Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1AB7 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 P1AB7 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 P1AB7 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 P1AB7 GMC Code

1. What are the common symptoms of OBDII code P1AB7 GMC (Starter/Generator Phase W Current Sensor Circuit Low Voltage)?

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

2. What are the possible causes of OBDII code P1AB7 GMC?

- Possible causes include a faulty current sensor, wiring or connection issues, a malfunctioning starter/generator, or a problem with the vehicle's electrical system.

3. How can I diagnose the cause of OBDII code P1AB7 GMC?

- Diagnosing this code typically involves using a diagnostic scan tool to read the code and testing the current sensor, wiring, connections, and electrical components related to the starter/generator system.

4. Can I drive my vehicle with OBDII code P1AB7 GMC?

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

5. How can I repair OBDII code P1AB7 GMC?

- Repairing this code may involve replacing the current sensor, repairing or replacing damaged wiring or connections, troubleshooting the starter/generator system, and clearing the fault code.

6. Is it safe to reset the OBDII code P1AB7 GMC without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as the problem may persist and potentially lead to more serious issues down the line.

7. How much does it typically cost to repair OBDII code P1AB7 GMC?

- The cost of repair can vary depending on the specific cause of the code, but it may involve parts and labor expenses ranging from $100 to $500 or more.

8. Can a DIY enthusiast fix OBDII code P1AB7 GMC at home?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code at home, especially if the issue is related to simple wiring or connection problems.

9. Are there any preventive measures to avoid OBDII code P1AB7 GMC in the future?

- Regular maintenance of the starter/generator system, checking for loose connections, and addressing any electrical issues promptly can help prevent the recurrence of this code in the future.

10. How long does it take to repair OBDII code P1AB7 GMC?

- The repair time can vary based on the specific cause of the code and the complexity of the repair process, but it may take anywhere from a few hours to a full day to complete the repair.