AutoCodes – GMC – P0B55 GMC

P0B55 GMC Code - Hybrid/Electric Vehicle Battery 6 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: P0B55 GMC indicates Hybrid/Electric Vehicle Battery 6 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 841

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 P0B55 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 P0B55 GMC - Hybrid/Electric Vehicle Battery 6 Circuit Performance - AutoCodes.com — P0B55 GMC Code - Hybrid/Electric Vehicle Battery 6 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B55 GMC?

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

How to Fix the DTC P0B55 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 P0B55 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 P0B55 GMC Code

1. What are common symptoms of OBDII code P0B55 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced battery performance, decreased fuel efficiency, and potential issues with engine starting and charging.

2. What can cause the OBDII code P0B55 in a GMC hybrid/electric vehicle?

- The code P0B55 is typically triggered by issues related to the Hybrid/Electric Vehicle Battery 6 Circuit, such as a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P0B55 in my GMC hybrid/electric vehicle?

- Diagnosis involves using a scan tool to read the code, conducting a thorough inspection of the battery system, checking for loose connections, and testing the battery cells for proper voltage levels.

4. Can I continue driving my GMC hybrid/electric vehicle with the OBDII code P0B55 present?

- It is not recommended to drive the vehicle with the P0B55 code active, as it can lead to further damage to the battery system and potentially affect the vehicle's overall performance.

5. How can I repair the OBDII code P0B55 in my GMC hybrid/electric vehicle?

- Repairing the P0B55 code may involve replacing the Hybrid/Electric Vehicle Battery 6 Circuit components, repairing damaged wiring, resetting the battery management system, or seeking assistance from a qualified technician.

6. Are there any safety precautions I should take when dealing with the OBDII code P0B55 in my GMC hybrid/electric vehicle?

- When working on the battery system, always follow proper safety procedures, such as disconnecting the power source, wearing protective gear, and ensuring proper ventilation in the work area.

7. How much does it typically cost to repair the OBDII code P0B55 in a GMC hybrid/electric vehicle?

- The cost of repairs for the P0B55 code can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to obtain quotes from multiple repair shops for an accurate estimate.

8. Can I reset the OBDII code P0B55 in my GMC hybrid/electric vehicle on my own?

- While you may be able to clear the code temporarily by disconnecting the battery, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. Will the OBDII code P0B55 affect the overall performance of my GMC hybrid/electric vehicle?

- Yes, the P0B55 code can impact the performance of the vehicle, particularly in terms of battery efficiency, power delivery, and overall driving experience.

10. How often should I have my GMC hybrid/electric vehicle inspected for potential issues related to the OBDII code P0B55?

- It is recommended to have your vehicle inspected regularly by a qualified technician, especially if you notice any symptoms associated with the P0B55 code or if you experience any unusual behavior while driving.