AutoCodes – GMC – P0B98 GMC

P0B98 GMC Code - Hybrid/Electric Vehicle Battery 19 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: P0B98 GMC indicates Hybrid/Electric Vehicle Battery 19 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 966

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 P0B98 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 P0B98 GMC - Hybrid/Electric Vehicle Battery 19 Circuit High Voltage - AutoCodes.com — P0B98 GMC Code - Hybrid/Electric Vehicle Battery 19 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B98 GMC?

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

How to Fix the DTC P0B98 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 P0B98 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 P0B98 GMC Code

What does the OBDII code P0B98 mean on a GMC vehicle?

The P0B98 code indicates a "Hybrid/Electric Vehicle Battery 19 Circuit High Voltage" issue, meaning the vehicle's control module has detected abnormally high voltage in the battery circuit 19.

What are the common symptoms of the P0B98 code?

Symptoms may include the check engine light or hybrid system warning light turning on, reduced vehicle performance, difficulty starting, or the vehicle entering limp mode.

What causes the P0B98 code on a GMC hybrid or electric vehicle?

Possible causes include a faulty battery module, wiring issues such as damaged or corroded connectors, a malfunctioning battery management system, or a software glitch in the control module.

Is it safe to drive with a P0B98 code on a GMC vehicle?

Itâ€™s not recommended to drive with this code, as it may indicate high voltage issues that could lead to further damage or safety risks to the hybrid/electric system.

How is the P0B98 code diagnosed?

A technician will use a scan tool to read the code, inspect the battery and related wiring, check for loose or corroded connections, and test the battery module and control systems for faults.

Can the P0B98 code be fixed by resetting the system?

While clearing the code with a scan tool may temporarily turn off the warning light, the underlying issue must be fixed to prevent the code from returning.

How much does it cost to repair a P0B98 code on a GMC vehicle?

Repair costs can vary widely depending on the cause, ranging from $100 for minor wiring repairs to over $1,000 for battery module replacement or extensive electrical work.

What tools are needed to troubleshoot the P0B98 code?

Common tools include an OBDII scan tool, a multimeter to check voltage, and possibly specialized diagnostic equipment for hybrid/electric systems.

Can a P0B98 code indicate a problem with the entire battery pack?

Not necessarily; it typically points to an issue with a specific circuit or module (Battery 19), though the entire pack should be inspected if needed.

What preventive maintenance can help avoid the P0B98 code?

Regular inspections of the hybrid battery system, keeping connections clean and secure, and addressing warning lights promptly can help prevent this issue.