AutoCodes – GMC – P0B8C GMC

P0B8C GMC Code - Hybrid/Electric Vehicle Battery 17 Circuit Performance

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: P0B8C GMC indicates Hybrid/Electric Vehicle Battery 17 Circuit Performance.
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 852

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 P0B8C 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 P0B8C GMC - Hybrid/Electric Vehicle Battery 17 Circuit Performance - AutoCodes.com — P0B8C GMC Code - Hybrid/Electric Vehicle Battery 17 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B8C GMC?

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

How to Fix the DTC P0B8C 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 P0B8C 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 P0B8C GMC Code

1. What are the common symptoms of OBDII code P0B8C in a GMC hybrid/electric vehicle?

- Common symptoms include poor fuel economy, reduced power, and the illumination of the check engine light.

2. What are possible causes of the OBDII code P0B8C related to Hybrid/Electric Vehicle Battery 17 Circuit Performance in a GMC vehicle?

- Possible causes may include a faulty high voltage battery pack, damaged battery cells, wiring issues, or problems with the battery management system.

3. How can I diagnose the OBDII code P0B8C in my GMC hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking the high voltage battery system, inspecting wiring connections, and testing the battery cells.

4. Can I continue driving my GMC hybrid/electric vehicle with the OBDII code P0B8C?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the high voltage battery system and affect overall vehicle performance.

5. How can I repair the OBDII code P0B8C in my GMC hybrid/electric vehicle?

- Repair options may include replacing the high voltage battery pack, repairing damaged wiring, resetting the battery management system, or seeking assistance from a certified technician.

6. Is it safe to attempt repairs on the high voltage system related to the OBDII code P0B8C in a GMC hybrid/electric vehicle?

- Due to the high voltage nature of the system, it is recommended to leave repairs involving the high voltage system to trained professionals to avoid safety hazards.

7. What should I do if I encounter the OBDII code P0B8C intermittently in my GMC hybrid/electric vehicle?

- If the code appears intermittently, it is still important to address the underlying issue promptly to prevent potential damage to the high voltage battery system.

8. How often should the high voltage battery system in a GMC hybrid/electric vehicle be inspected to prevent the OBDII code P0B8C from occurring?

- Regular maintenance and inspections of the high voltage battery system are recommended as part of routine servicing to catch any issues early and prevent the occurrence of this code.

9. Can extreme weather conditions impact the occurrence of the OBDII code P0B8C in a GMC hybrid/electric vehicle?

- Yes, extreme temperatures can affect the performance of the high voltage battery system, potentially leading to issues that trigger the OBDII code P0B8C.

10. Are there any specific driving habits or practices that can help prevent the OBDII code P0B8C from appearing in a GMC hybrid/electric vehicle?

- Maintaining a consistent charging routine, avoiding deep discharges of the high voltage battery, and following the manufacturer's recommended maintenance schedule can help prevent issues that trigger this code.