AutoCodes – Chevrolet – P0BBB Chevrolet

P0BBB Chevrolet Code - Hybrid/Electric Vehicle Battery 26 Circuit High 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: P0BBB Chevrolet indicates Hybrid/Electric Vehicle Battery 26 Circuit High 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 981

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0BBB 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 P0BBB Chevrolet - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage - AutoCodes.com — P0BBB Chevrolet Code - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BBB Chevrolet?

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

How to Fix the DTC P0BBB 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 P0BBB 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 P0BBB Chevrolet Code

What does the OBDII code P0BBB mean for my Chevrolet vehicle?

The code P0BBB indicates a problem with the hybrid or electric vehicle battery's 26 circuit, specifically indicating high voltage in that circuit.

What are common symptoms associated with the P0BBB code?

Common symptoms may include reduced vehicle performance, warning lights on the dashboard, and potential issues with the hybrid or electric drive system.

What could cause the P0BBB code to trigger?

Causes may include a faulty battery module, poor electrical connections, a malfunctioning battery management system, or damaged wiring in the high-voltage circuit.

How can I diagnose the P0BBB code?

Start by using an OBDII scanner to confirm the code. Inspect the high-voltage battery connections and wiring for damage, check the battery management system, and test the individual battery cells for proper function.

Is it safe to drive my Chevrolet with the P0BBB code?

It is generally not safe to drive the vehicle if this code is active, as it may indicate a serious issue with the hybrid or electric battery system that could lead to further damage or safety risks.

What repairs might be needed for the P0BBB code?

Repairs could involve replacing faulty battery modules, repairing damaged wiring, replacing connectors, or recalibrating the battery management system.

Can I clear the P0BBB code myself?

Yes, you can clear the code using an OBDII scanner; however, if the underlying issue is not resolved, the code is likely to return.

How much does it typically cost to fix a P0BBB code?

Repair costs can vary widely, but they may range from a few hundred to several thousand dollars, depending on whether you need to replace the battery or just repair wiring and connections.

Should I take my vehicle to a dealership for the P0BBB code?

While you can visit a dealership for specialized expertise, many qualified independent mechanics can diagnose and repair hybrid and electric vehicle issues as well.