AutoCodes – GMC – P0B54 GMC

P0B54 GMC Code - Hybrid/Electric Vehicle Battery 6 Circuit

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: P0B54 GMC indicates Hybrid/Electric Vehicle Battery 6 Circuit.
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 879

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 P0B54 GMC 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 P0B54 GMC - Hybrid/Electric Vehicle Battery 6 Circuit - AutoCodes.com — P0B54 GMC Code - Hybrid/Electric Vehicle Battery 6 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B54 GMC?

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

How to Fix the DTC P0B54 GMC?

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 P0B54 GMC 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 P0B54 GMC Code

1. What does the OBDII code P0B54 mean on a GMC?

Code P0B54 indicates an issue in the Hybrid/Electric Vehicle Battery 6 Circuit, typically related to the voltage or communication for battery block 6.

2. What are the common symptoms of a P0B54 code on a GMC?

Symptoms may include reduced hybrid system performance, warning lights on the dashboard, decreased fuel efficiency, or the vehicle entering limp mode.

3. What causes a P0B54 code to trigger on a GMC vehicle?

This code can be caused by a faulty battery module, damaged wiring or connectors, a malfunctioning battery control module, or imbalanced battery voltage.

4. Can I drive my GMC with a P0B54 code active?

Itâ€™s not recommended to drive with this code active, as it may lead to further damage to the hybrid system or reduced vehicle performance.

5. How is the P0B54 code diagnosed on a GMC?

A technician will use a scan tool to read the code, inspect the battery module and its circuits, check for voltage imbalances, and test the wiring and connectors for continuity.

6. How do you fix the P0B54 code on a GMC?

Repairs may include replacing the faulty battery module, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the battery control module.

7. Is the P0B54 code specific to battery block 6?

Yes, it specifically refers to an issue with the voltage or circuit associated with battery block 6 in the hybrid or electric vehicle system.

8. Could a P0B54 code be caused by a software issue?

While rare, a software issue in the battery control module could potentially cause this code. In such cases, reprogramming or updating the module may resolve the problem.

9. How much does it cost to repair a P0B54 code on a GMC?

Repair costs can vary widely depending on the issue, with battery module replacement potentially costing $1,000-$4,000, while wiring repairs may cost significantly less.

10. Can a weak 12-volt battery cause the P0B54 code?

A weak 12-volt battery is unlikely to directly cause this code, but it could contribute to communication or diagnostic errors in the hybrid system.