AutoCodes – Generic – P1BC2

P1BC2 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 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 2,389

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 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 - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage - AutoCodes.com — P1BC2 Code - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC2?

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

How to Fix the DTC P1BC2?

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 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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Need Help with the Code?

Get the P1BC2 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BC2 Buick — Hybrid/Electric Vehicle Battery 74 Circuit High Voltage
P1BC2 Cadillac — Hybrid/Electric Vehicle Battery 74 Circuit High Voltage
P1BC2 Chevrolet — Hybrid/Electric Vehicle Battery 74 Circuit High Voltage
P1BC2 GMC — Hybrid/Electric Vehicle Battery 74 Circuit High Voltage
P1BC2 Saturn — Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P1BC2 related to Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Common symptoms include the illumination of the Check Engine Light, reduced fuel efficiency, and potential drivability issues.

2. What are the possible causes of OBDII code P1BC2 indicating Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Potential causes may include a faulty high voltage battery, issues with battery management system sensors, or wiring problems in the circuit.

3. How can I diagnose the OBDII code P1BC2 in relation to Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Proper diagnosis requires using a professional OBDII scanner to read the code, followed by conducting detailed testing of the high voltage battery system and associated components.

4. Are there any safety precautions to keep in mind when dealing with Hybrid/Electric Vehicle Battery 74 Circuit High Voltage issues?

- Yes, it is crucial to follow manufacturer guidelines and disconnect the high voltage system properly to avoid any risks of electric shock or damage.

5. Can I continue driving my vehicle with OBDII code P1BC2 related to Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the high voltage system or other components.

6. What repair steps can be taken to address OBDII code P1BC2 indicating Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Repair steps may involve replacing the high voltage battery, repairing wiring issues, calibrating sensors, or resetting the battery management system.

7. How much does it typically cost to repair OBDII code P1BC2 related to Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Repair costs can vary depending on the specific issue, but it is advisable to consult with a professional technician for an accurate diagnosis and cost estimate.

8. Can a DIY enthusiast attempt to fix OBDII code P1BC2 associated with Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Due to the complexity and safety considerations involved with high voltage systems, it is recommended to seek assistance from a qualified technician for proper diagnosis and repair.

9. Are there any recalls or technical service bulletins related to OBDII code P1BC2 Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- It is advisable to check with the vehicle manufacturer or authorized service center to inquire about any existing recalls or service bulletins related to this issue.

10. How can I prevent OBDII code P1BC2 Hybrid/Electric Vehicle Battery 74 Circuit High Voltage from occurring in the future?

- Regular maintenance of the high voltage system, following manufacturer guidelines, and addressing any warning signs promptly can help prevent this code from occurring.