AutoCodes – Cadillac – P0B55 Cadillac

P0B55 Cadillac 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 Cadillac 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 808

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

What does this mean?

What are the Possible Causes of the DTC P0B55 Cadillac?

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

How to Fix the DTC P0B55 Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential warning lights on the dashboard.

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

- The code P0B55 typically indicates a performance issue in the hybrid/electric vehicle battery 6 circuit, which can be caused by a faulty battery cell, wiring issues, or a malfunctioning battery management system.

3. How serious is the OBDII code P0B55 in a Cadillac hybrid/electric vehicle?

- The P0B55 code should be addressed promptly as it can impact the overall performance and efficiency of the hybrid/electric system. Ignoring the issue may lead to further damage and reduced driving range.

4. Can I continue driving my Cadillac with the OBDII code P0B55 present?

- While it may be possible to drive the vehicle with the code present, it is recommended to have the issue diagnosed and repaired by a qualified technician to prevent potential damage to the hybrid/electric system.

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

- Diagnosing the P0B55 code typically involves using a diagnostic scanner to retrieve the specific fault codes, conducting a visual inspection of the battery and related components, and performing voltage and resistance tests.

6. Is it possible to repair the OBDII code P0B55 in a Cadillac hybrid/electric vehicle without professional help?

- While some basic troubleshooting steps can be taken by experienced DIYers, diagnosing and repairing the P0B55 code often requires specialized knowledge and equipment, so it is recommended to seek professional assistance.

7. What are some potential repair tips for addressing the OBDII code P0B55 in a Cadillac hybrid/electric vehicle?

- Repair tips may include checking and cleaning battery connections, testing individual battery cells, inspecting wiring for damage, and resetting the battery management system.

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

- The cost of repairing the P0B55 code can vary depending on the underlying issue, parts needed, and labor costs. It is advisable to obtain multiple quotes from reputable repair shops.

9. Can a faulty hybrid/electric vehicle battery cause the OBDII code P0B55 in a Cadillac?

- Yes, a faulty battery cell or issues within the hybrid/electric vehicle battery can trigger the P0B55 code due to performance issues in the battery 6 circuit.

10. Is there a way to prevent the OBDII code P0B55 from occurring in my Cadillac hybrid/electric vehicle?

- Regular maintenance of the hybrid/electric system, including checking battery health, keeping connections clean, and addressing any warning lights promptly, can help prevent the occurrence of the P0B55 code.