AutoCodes – Chevrolet – P1BAC Chevrolet

P1BAC Chevrolet Code - Hybrid/Electric Vehicle Battery 67 Circuit Low Voltage

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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: P1BAC Chevrolet indicates Hybrid/Electric Vehicle Battery 67 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
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 1,127

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 Mar 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BAC Chevrolet Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1BAC Chevrolet - Hybrid/Electric Vehicle Battery 67 Circuit Low Voltage - AutoCodes.com — P1BAC Chevrolet Code - Hybrid/Electric Vehicle Battery 67 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BAC Chevrolet?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P1BAC 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 P1BAC 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 P1BAC Chevrolet Code

1. What are the common symptoms of OBDII code P1BAC in a Chevrolet Hybrid/Electric Vehicle?

- Common symptoms include reduced electric range, poor performance, and difficulty starting the vehicle.

2. What can cause the OBDII code P1BAC in a Chevrolet Hybrid/Electric Vehicle?

- The code P1BAC typically indicates a low voltage condition in the battery 67 circuit, which can be caused by a faulty battery, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1BAC in my Chevrolet Hybrid/Electric Vehicle?

- It is recommended to use a diagnostic scanner to retrieve the specific details of the code and perform a thorough inspection of the battery 67 circuit components, including the battery itself, wiring connections, and control modules.

4. Can I still drive my Chevrolet Hybrid/Electric Vehicle with the OBDII code P1BAC present?

- It is not recommended to drive the vehicle with the code P1BAC present, as it can lead to further damage to the battery system and potentially cause safety hazards.

5. How can I repair the OBDII code P1BAC in my Chevrolet Hybrid/Electric Vehicle?

- Repairing the code P1BAC may involve replacing the battery, repairing damaged wiring, or recalibrating the battery management system. It is advisable to seek professional help for accurate diagnosis and repair.

6. Is the OBDII code P1BAC in a Chevrolet Hybrid/Electric Vehicle a serious issue?

- Yes, the code P1BAC indicating low voltage in the battery 67 circuit is a serious issue that needs to be addressed promptly to avoid further damage to the vehicle's electrical system.

7. How much does it cost to repair the OBDII code P1BAC in a Chevrolet Hybrid/Electric Vehicle?

- The cost of repairing the code P1BAC can vary depending on the root cause of the issue and the parts/labour required. It is recommended to obtain quotes from reputable repair shops.

8. Can a DIY enthusiast fix the OBDII code P1BAC in a Chevrolet Hybrid/Electric Vehicle?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the code P1BAC may require specialized tools and expertise. It is best to consult a professional technician.

9. Will resetting the OBDII code P1BAC make it go away permanently?

- Simply resetting the code P1BAC may temporarily clear the warning light, but the underlying issue causing the code will persist unless properly diagnosed and repaired.

10. How often does the OBDII code P1BAC occur in Chevrolet Hybrid/Electric Vehicles?

- The OBDII code P1BAC related to the battery 67 circuit low voltage can occur sporadically in Chevrolet Hybrid/Electric Vehicles, usually due to age-related wear and tear on the battery components.