AutoCodes – Chevrolet – P1BC1 Chevrolet

P1BC1 Chevrolet Code - Hybrid/Electric Vehicle Battery 74 Circuit Low 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: P1BC1 Chevrolet indicates Hybrid/Electric Vehicle Battery 74 Circuit Low 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 1,103

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 P1BC1 Chevrolet 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 P1BC1 Chevrolet - Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage - AutoCodes.com — P1BC1 Chevrolet Code - Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC1 Chevrolet?

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

How to Fix the DTC P1BC1 Chevrolet?

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 P1BC1 Chevrolet 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 P1BC1 Chevrolet Code

1. What are the common symptoms of OBDII code P1BC1 Chevrolet related to the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

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

2. What are the possible causes of OBDII code P1BC1 Chevrolet indicating Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

- Possible causes include a faulty battery cell, damaged battery pack, poor electrical connections, or issues with the battery management system.

3. How can I diagnose OBDII code P1BC1 Chevrolet for the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

- Diagnosing this code typically involves using a scan tool to read the code, checking the battery voltage levels, inspecting the battery connections, and testing the battery pack for any internal faults.

4. Are there any safety precautions to consider when working on the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage issue?

- Yes, it is important to follow proper safety procedures when working with high-voltage systems in hybrid or electric vehicles. Ensure that the vehicle is powered off, wear insulated gloves, and consult the vehicle's service manual for specific safety guidelines.

5. Can I repair OBDII code P1BC1 Chevrolet related to the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage myself?

- Repairing this code may require specialized knowledge and tools due to the high-voltage nature of hybrid and electric vehicle systems. It is recommended to seek professional assistance or consult a certified technician for proper diagnosis and repair.

6. How much does it typically cost to repair OBDII code P1BC1 Chevrolet for the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

- The cost of repair can vary depending on the specific issue causing the code, the extent of the damage, and labor rates. It is advisable to obtain a diagnosis from a qualified technician to determine an accurate repair cost.

7. Can driving with OBDII code P1BC1 Chevrolet present any risks to the vehicle or driver?

- Continuing to drive with this code may lead to further damage to the hybrid/electric vehicle's battery system, potentially resulting in drivability issues or complete failure. It is recommended to address the issue promptly to avoid any safety risks.

8. How long does it take to repair OBDII code P1BC1 Chevrolet for the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

- The repair time can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed in a few hours, while more extensive repairs could take a day or longer to complete.

9. Are there any preventive maintenance tips to help avoid OBDII code P1BC1 Chevrolet related to the Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

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

10. Can a low 12V battery voltage in a hybrid/electric vehicle trigger OBDII code P1BC1 Chevrolet for Hybrid/Electric Vehicle Battery 74 Circuit Low Voltage?

- Yes, a low 12V battery voltage can sometimes trigger this code as it may affect the overall performance and charging of the high-voltage battery system in hybrid/electric vehicles.