AutoCodes – Buick – P0B3C Buick

P0B3C Buick Code - Hybrid/Electric Vehicle Battery 1 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: P0B3C Buick indicates Hybrid/Electric Vehicle Battery 1 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 936

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 P0B3C 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 P0B3C Buick - Hybrid/Electric Vehicle Battery 1 Circuit Performance - AutoCodes.com — P0B3C Buick Code - Hybrid/Electric Vehicle Battery 1 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B3C Buick?

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

How to Fix the DTC P0B3C 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 P0B3C 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 P0B3C Buick Code

1. What does the OBDII code P0B3C mean in a Buick?

The P0B3C code indicates a performance issue with the Hybrid/Electric Vehicle Battery 1 Circuit, which may impact the vehicle's hybrid or electric drive system.

2. What are the common symptoms of code P0B3C?

Common symptoms include reduced fuel efficiency, a "Check Engine" or hybrid system warning light, limited electric drive performance, or difficulty maintaining battery charge levels.

3. What causes the P0B3C code to appear in a Buick?

This code can be caused by a faulty battery sensor, damaged wiring or connectors in the battery circuit, a malfunctioning hybrid battery control module, or an issue with the battery pack itself.

4. Can I drive my Buick with the P0B3C code present?

While the vehicle may remain drivable, ignoring this code can lead to diminished hybrid system performance and potentially cause further damage to the electrical or battery system.

5. How is the P0B3C code diagnosed?

A technician will use a scan tool to confirm the code, inspect the battery circuit for damaged wiring or loose connections, and test the hybrid battery sensor and control module for proper operation.

6. What repairs are needed to fix the P0B3C code?

Repairs may include replacing a faulty battery sensor, repairing damaged wiring, cleaning and securing electrical connections, or in severe cases, replacing the hybrid battery pack or control module.

7. How much does it cost to fix the P0B3C code in a Buick?

Repair costs can vary widely depending on the issue but may range from $100 for wiring repairs to over $1,000 if the battery pack or control module needs replacement.

8. Can a weak 12-volt battery cause the P0B3C code?

While unlikely, a weak 12-volt battery can indirectly affect the hybrid system and may need to be tested as part of the diagnosis.

9. How can I prevent the P0B3C code from occurring?

Regular maintenance of the hybrid system, ensuring proper battery cooling, and addressing any warning lights promptly can help prevent this code.

10. Does the P0B3C code require reprogramming of the hybrid control module?

In some cases, the control module may need to be reprogrammed or updated as part of the repair process, depending on the specific issue and manufacturer recommendations.