AutoCodes – Chevrolet – P1B6A Chevrolet

P1B6A Chevrolet Code - Hybrid/Electric Vehicle Battery 45 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: P1B6A Chevrolet indicates Hybrid/Electric Vehicle Battery 45 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 817

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 P1B6A 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 P1B6A Chevrolet - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage - AutoCodes.com — P1B6A Chevrolet Code - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6A Chevrolet?

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

How to Fix the DTC P1B6A 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 P1B6A 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 P1B6A Chevrolet Code

1. What does the OBDII code P1B6A mean for a Chevrolet vehicle?

P1B6A indicates that the vehicle's control module has detected a low voltage issue in the Hybrid/Electric Vehicle Battery 45 circuit.

2. What are the common symptoms of the P1B6A code?

Symptoms may include a check engine light, reduced hybrid/electric vehicle performance, decreased fuel efficiency, or the vehicle entering a limp mode.

3. What causes the P1B6A code to appear on a Chevrolet?

Common causes include a faulty hybrid battery cell, damaged wiring or connectors in the battery circuit, or a malfunctioning battery energy control module.

4. Can a loose connection trigger the P1B6A code?

Yes, loose or corroded connections in the Hybrid/Electric Vehicle Battery 45 circuit can cause this code to set.

5. How is the P1B6A code diagnosed?

A technician will typically use a scan tool to read the code, inspect the battery circuit for damaged wiring or connections, and test the voltage and integrity of the hybrid battery cells.

6. Is the P1B6A code specific to Chevrolet hybrid or electric vehicles?

Yes, this code is specific to Chevrolet hybrid or electric vehicles and relates to the performance of their hybrid battery systems.

7. Can I drive with the P1B6A code active?

While the vehicle may still be drivable, it is not recommended as it can lead to further damage or reduced performance, especially in hybrid or electric modes.

8. How can I fix the P1B6A code on my Chevrolet?

Repairs may involve replacing a damaged hybrid battery module, repairing or replacing faulty wiring or connectors, or reprogramming the battery energy control module.

9. How much does it cost to repair the P1B6A code?

Costs can vary widely depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 if the hybrid battery needs replacement.

10. Can a software update fix the P1B6A code?

In some cases, a software update for the battery energy control module may resolve the issue, but this depends on the manufacturerâ€™s recommendations and specific vehicle circumstances.