AutoCodes – Buick – P1AB3 Buick

P1AB3 Buick Code - Starter/Generator Phase U 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: P1AB3 Buick indicates Starter/Generator Phase U 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 881

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 P1AB3 Buick 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 P1AB3 Buick - Starter/Generator Phase U Current Sensor Circuit Low Voltage - AutoCodes.com — P1AB3 Buick Code - Starter/Generator Phase U Current Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1AB3 Buick?

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 P1AB3 Buick?

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 P1AB3 Buick 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 P1AB3 Buick Code

1. What does the OBDII code P1AB3 mean on a Buick?

P1AB3 indicates a low voltage issue in the Starter/Generator Phase U Current Sensor Circuit, which monitors the electrical current in your vehicleâ€™s hybrid or electric system.

2. What are common symptoms of code P1AB3 in a Buick?

Symptoms may include a check engine light, reduced hybrid/electric system performance, difficulty starting, or decreased fuel efficiency.

3. What causes the P1AB3 code to appear in a Buick?

Possible causes include a faulty current sensor, damaged wiring or connectors, a malfunctioning starter/generator, or an issue with the vehicle's hybrid control module.

4. How do I diagnose the P1AB3 code on my Buick?

Inspect the wiring and connectors for damage, test the current sensor for proper operation, and check for voltage or continuity issues in the circuit.

5. Can I drive my Buick with the P1AB3 code?

Itâ€™s not recommended, as the issue may cause reduced performance or further damage to the hybrid/electric system.

6. How do I fix the P1AB3 code on a Buick?

Repairs may involve replacing the current sensor, repairing damaged wiring, or reprogramming or replacing the hybrid control module if necessary.

7. Is the P1AB3 code specific to hybrid or electric Buicks?

Yes, this code typically applies to hybrid or electric models equipped with a starter/generator system.

8. How much does it cost to repair the P1AB3 code on a Buick?

Repair costs vary, but diagnosing and fixing the issue may range from $150 to $500, depending on the exact cause and labor rates.

9. Can a low vehicle battery trigger the P1AB3 code?

Yes, a weak or failing 12V battery can contribute to electrical issues, including this code, in hybrid/electric vehicles.

10. Do I need a professional mechanic to fix the P1AB3 code?

While minor wiring repairs may be done by experienced DIYers, diagnosing and fixing hybrid/electric system issues is best handled by a qualified technician.