AutoCodes – Cadillac – P0BB6 Cadillac

P0BB6 Cadillac Code - Hybrid/Electric Vehicle Battery 25 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: P0BB6 Cadillac indicates Hybrid/Electric Vehicle Battery 25 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 839

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 P0BB6 Cadillac 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 P0BB6 Cadillac - Hybrid/Electric Vehicle Battery 25 Circuit High Voltage - AutoCodes.com — P0BB6 Cadillac Code - Hybrid/Electric Vehicle Battery 25 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BB6 Cadillac?

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

How to Fix the DTC P0BB6 Cadillac?

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 P0BB6 Cadillac 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 P0BB6 Cadillac Code

What does the OBDII code P0BB6 mean for my Cadillac?

The P0BB6 code indicates a high voltage issue in the battery 25 circuit of a hybrid or electric vehicle, which may affect the performance of the vehicle's hybrid system.

What symptoms might I experience if my Cadillac has the P0BB6 code?

Common symptoms include warning lights on the dashboard, reduced engine power, decreased fuel efficiency, and potential loss of hybrid functionality.

What are the possible causes of the P0BB6 code?

Possible causes include a faulty battery pack, damaged wiring or connectors in the battery circuit, a malfunctioning battery management system, or issues with the high voltage system.

Can I drive my Cadillac if the P0BB6 code is present?

It is not recommended to drive the vehicle if the P0BB6 code is present, as it may lead to performance issues and could cause further damage to the hybrid system.

How can I diagnose the P0BB6 code?

To diagnose the P0BB6 code, you should use an OBDII scanner to retrieve the code and any related codes, inspect the battery connections and wiring, and check the battery management system for faults.

What repairs might be needed to fix the P0BB6 code?

Repairs may include replacing damaged wiring or connectors, repairing or replacing the battery pack, or servicing the battery management system.

Is it safe to work on the high voltage battery system myself?

It is not recommended for untrained individuals to work on high voltage systems due to the risk of electric shock and damage to the vehicle. Always consult a qualified technician.

How much might it cost to repair the issues related to the P0BB6 code?

Repair costs can vary widely based on the specific issue, but it can range from a few hundred dollars for minor repairs to several thousand dollars for battery replacements.

Will clearing the code P0BB6 fix the problem?

Clearing the code may temporarily turn off the warning lights, but it will not fix the underlying issue. The code will likely return if the problem is not addressed.