AutoCodes – GMC – P0B68 GMC

P0B68 GMC Code - Hybrid/Electric Vehicle Battery 10 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: P0B68 GMC indicates Hybrid/Electric Vehicle Battery 10 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 868

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 P0B68 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 P0B68 GMC - Hybrid/Electric Vehicle Battery 10 Circuit - AutoCodes.com — P0B68 GMC Code - Hybrid/Electric Vehicle Battery 10 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B68 GMC?

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

How to Fix the DTC P0B68 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 P0B68 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 P0B68 GMC Code

1. What does the OBDII code P0B68 mean on a GMC vehicle?

The P0B68 code indicates an issue with the Hybrid/Electric Vehicle Battery 10 Circuit, typically involving voltage irregularities or communication errors in the battery module.

2. What are the common symptoms of the P0B68 code?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, limited hybrid or electric power, and possible loss of regenerative braking.

3. What causes the P0B68 code to appear?

The code can be triggered by a faulty battery module, damaged wiring or connectors in the Battery 10 Circuit, or a malfunctioning battery control module.

4. Can I drive my GMC vehicle with a P0B68 code?

It is not recommended to drive the vehicle extensively with this code, as it may lead to reduced performance or further damage to the hybrid/electric battery system.

5. How is the P0B68 code diagnosed?

A technician will use a scan tool to check for related codes, inspect the Battery 10 Circuit wiring and connectors, and test the battery module for voltage or communication issues.

6. How do you fix the P0B68 code on a GMC vehicle?

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

7. What tools are needed to diagnose the P0B68 code?

A diagnostic scan tool capable of reading hybrid/electric vehicle systems, a multimeter for voltage testing, and possibly manufacturer-specific diagnostic software.

8. Can a software update fix the P0B68 code?

In some cases, a software update for the battery control module may resolve the issue if the problem is related to outdated programming.

9. How much does it cost to repair the P0B68 code?

The repair cost can vary widely depending on the root cause, ranging from $100 for wiring repairs to over $1,000 if the battery module needs replacement.

10. What preventive measures can avoid the P0B68 code?

Regular maintenance of the hybrid/electric system, keeping connectors clean and secure, and addressing any warning lights promptly can help prevent the P0B68 code.