AutoCodes – Chevrolet – P0B55 Chevrolet

P0B55 Chevrolet Code - Hybrid/Electric Vehicle Battery 6 Circuit Performance

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: P0B55 Chevrolet indicates Hybrid/Electric Vehicle Battery 6 Circuit Performance.
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 1,180

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B55 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 P0B55 Chevrolet - Hybrid/Electric Vehicle Battery 6 Circuit Performance - AutoCodes.com — P0B55 Chevrolet Code - Hybrid/Electric Vehicle Battery 6 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B55 Chevrolet?

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

How to Fix the DTC P0B55 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 P0B55 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 P0B55 Chevrolet Code

What does the OBDII code P0B55 mean for my Chevrolet vehicle?

The OBDII code P0B55 indicates a problem with the performance of the 6 circuit in the hybrid or electric vehicle battery system, suggesting an issue with the battery management system or its components.

What symptoms might I experience if my vehicle has the P0B55 code?

Common symptoms include reduced power during acceleration, decreased fuel efficiency, warning lights on the dashboard, and possible hybrid system failure.

What could cause the P0B55 code to appear?

Causes may include a malfunctioning battery module, issues with battery management software, faulty wiring or connectors, or problems with the battery control unit.

How can I diagnose the issue related to the P0B55 code?

You can start by using an OBDII scanner to confirm the code and check for other related codes. Inspect the battery connections and wiring for damage or corrosion, and consider testing the individual battery cells for performance.

What repairs might be necessary to fix the P0B55 code?

Repairs could involve replacing faulty battery modules, repairing or replacing damaged wiring or connectors, updating the battery management software, or replacing the battery control unit if it's malfunctioning.

Can I drive my Chevrolet if the P0B55 code is present?

It's not recommended to drive the vehicle with the P0B55 code, as it may lead to further damage to the hybrid system or reduced vehicle performance.

How can I prevent the P0B55 code from occurring in the future?

Regular maintenance of the hybrid battery system, including inspections and software updates, can help prevent issues. Keeping the battery clean and ensuring proper cooling can also extend its lifespan.

Is it safe to clear the P0B55 code without addressing the underlying issue?

Clearing the code without fixing the underlying problem is not advisable, as the issue may lead to more significant damage and may cause the vehicle to enter a limp mode.

What should I do if I am unable to diagnose the P0B55 code myself?

If you cannot diagnose the issue, itâ€™s best to take your vehicle to a qualified mechanic or dealership that specializes in hybrid or electric vehicles for a thorough inspection and repair.