AutoCodes – Buick – P1BC2 Buick

P1BC2 Buick Code - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

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: P1BC2 Buick indicates Hybrid/Electric Vehicle Battery 74 Circuit High Voltage.
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 856

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BC2 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 P1BC2 Buick - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage - AutoCodes.com — P1BC2 Buick Code - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC2 Buick?

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

How to Fix the DTC P1BC2 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 P1BC2 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 P1BC2 Buick Code

1. What are the common symptoms of OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle?

- Common symptoms may include the check engine light illuminating, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What does the OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle indicate?

- The code P1BC2 typically points to a fault in the Hybrid/Electric Vehicle Battery 74 Circuit High Voltage system.

3. What are some possible causes of OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle?

- Possible causes include a malfunctioning high voltage battery pack, damaged wiring or connectors, issues with the battery management system, or other electrical faults.

4. How can I diagnose the OBDII code P1BC2 in my Buick Hybrid/Electric Vehicle?

- Proper diagnosis usually involves using a professional OBDII scanner to retrieve the code, conducting a visual inspection of the high voltage battery components, and performing electrical tests as needed.

5. Can I continue driving my Buick Hybrid/Electric Vehicle with the P1BC2 code present?

- It is not recommended to drive the vehicle with the P1BC2 code active, as it could lead to further damage to the high voltage system or pose safety risks.

6. How can I reset the OBDII code P1BC2 in my Buick Hybrid/Electric Vehicle?

- Resetting the code typically involves using an OBDII scanner to clear the code after addressing the underlying issue causing the fault.

7. Is it safe to attempt repairs related to the Hybrid/Electric Vehicle Battery 74 Circuit High Voltage system on my own?

- Due to the high voltage nature of the system, it is recommended to seek assistance from a qualified technician or electrician for repairs related to the high voltage battery system.

8. What are some preventative maintenance tips to avoid OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle?

- Regularly inspecting the high voltage battery components, keeping the system clean and well-maintained, and addressing any warning signs promptly can help prevent issues leading to the P1BC2 code.

9. How much does it typically cost to repair OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the specific issue causing the code, the extent of the damage, and the labor rates of the repair shop. It is advisable to get a diagnostic assessment for an accurate estimate.

10. Can the OBDII code P1BC2 in a Buick Hybrid/Electric Vehicle be indicative of a serious problem?

- Yes, the P1BC2 code indicating a fault in the high voltage system should be taken seriously, as it can affect the performance and safety of the vehicle, requiring prompt attention.