AutoCodes – Buick – P0B50 Buick

P0B50 Buick Code - Hybrid/Electric Vehicle Battery 5 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: P0B50 Buick indicates Hybrid/Electric Vehicle Battery 5 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 818

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 P0B50 Buick 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 P0B50 Buick - Hybrid/Electric Vehicle Battery 5 Circuit Performance - AutoCodes.com — P0B50 Buick Code - Hybrid/Electric Vehicle Battery 5 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B50 Buick?

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

How to Fix the DTC P0B50 Buick?

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 P0B50 Buick 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 P0B50 Buick Code

1. What are the common symptoms of OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include decreased fuel efficiency, difficulty starting the vehicle, reduced power output, and the illumination of the check engine light.

2. What could cause the OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- The code P0B50 typically indicates a performance issue related to Hybrid/Electric Vehicle Battery 5 circuit, which could be caused by a faulty battery cell, wiring issues, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P0B50 in my Buick Hybrid/Electric Vehicle?

- Diagnosis usually involves using an OBDII scanner to retrieve the specific code and then conducting a thorough inspection of the battery system, including checking for loose connections, damaged wiring, or any visible signs of battery degradation.

4. What are the potential repair options for OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- Repair options may include replacing the faulty battery cell, repairing damaged wiring, resetting the battery management system, or recalibrating the hybrid system to address the performance issue.

5. Can I continue driving my Buick Hybrid/Electric Vehicle with the OBDII code P0B50 present?

- It is not recommended to continue driving the vehicle with the code P0B50 present, as it can lead to further damage to the hybrid system and potentially compromise the vehicle's performance and safety.

6. How much does it typically cost to repair OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- The cost of repairing the OBDII code P0B50 can vary depending on the underlying issue, but it may range from a few hundred to a few thousand dollars, especially if battery replacement is required.

7. Is it possible to reset the OBDII code P0B50 in a Buick Hybrid/Electric Vehicle without professional help?

- While it may be possible to clear the code temporarily using an OBDII scanner, it is important to address the root cause of the issue to prevent the code from reappearing.

8. Are there any maintenance tips to prevent OBDII code P0B50 from occurring in a Buick Hybrid/Electric Vehicle?

- Regularly inspecting the battery system, following the manufacturer's maintenance schedule, and avoiding extreme temperature conditions can help prevent issues that trigger the P0B50 code.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- While some basic repairs like checking connections and wiring may be possible for a DIY enthusiast, diagnosing and repairing complex issues related to the Hybrid/Electric Vehicle Battery 5 circuit may require professional expertise.

10. How long does it typically take to repair OBDII code P0B50 in a Buick Hybrid/Electric Vehicle?

- The repair time for the P0B50 code can vary depending on the extent of the issue and the availability of parts. It may take a few hours to several days to diagnose and repair the problem successfully.