AutoCodes – Chevrolet – P1AB1 Chevrolet

P1AB1 Chevrolet Code - Starter/Generator Phase U-V-W Current Sensor Overcurrent

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: P1AB1 Chevrolet indicates Starter/Generator Phase U-V-W Current Sensor Overcurrent.
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 1,732

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P1AB1 Chevrolet 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 P1AB1 Chevrolet - Starter/Generator Phase U-V-W Current Sensor Overcurrent - AutoCodes.com — P1AB1 Chevrolet Code - Starter/Generator Phase U-V-W Current Sensor Overcurrent

What does this mean?

What are the Possible Causes of the DTC P1AB1 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 P1AB1 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 P1AB1 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 P1AB1 Chevrolet Code

What does the OBDII code P1AB1 mean for my Chevrolet?

The code P1AB1 indicates an overcurrent condition detected in the starter/generator phase U-V-W current sensor, which may affect the vehicle's electrical system and performance.

What symptoms might I experience if my vehicle has the P1AB1 code?

Common symptoms include warning lights on the dashboard, reduced engine power, difficulties starting the vehicle, and unusual noises from the starter/generator system.

What could cause the P1AB1 code to trigger?

Causes may include a short circuit in the wiring, a malfunctioning starter/generator, a faulty current sensor, or issues with the vehicle's battery or charging system.

How can I diagnose the issue related to the P1AB1 code?

Use an OBDII scanner to confirm the code, then inspect the starter/generator, wiring, and connectors for damage. Checking the battery and the charging system's voltage output is also recommended.

What are some common repairs for the P1AB1 code?

Repairs may involve replacing the starter/generator, repairing or replacing damaged wiring, replacing a faulty current sensor, or addressing any issues with the battery or charging system.

Can I drive my Chevrolet with the P1AB1 code?

While it may be possible to drive the vehicle, it is not recommended, as the electrical system could fail, leading to further issues or unsafe driving conditions.

How can I prevent the P1AB1 code from occurring in the future?

Regular maintenance of the electrical system, including inspecting the battery, starter/generator, and wiring for wear or damage, can help prevent this code from reappearing.

Is it safe to clear the P1AB1 code without repairing the issue?

Clearing the code without addressing the underlying problem is not safe, as it may lead to further electrical issues and vehicle performance problems.

What should I do if the P1AB1 code returns after repairs?

If the code returns, further diagnosis is needed to identify any underlying issues that may have been missed, such as intermittent faults or related system failures.