AutoCodes – Chevrolet – P1BC2 Chevrolet

P1BC2 Chevrolet 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 Chevrolet 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 901

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

What does this mean?

What are the Possible Causes of the DTC P1BC2 Chevrolet?

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

How to Fix the DTC P1BC2 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 P1BC2 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 P1BC2 Chevrolet Code

1. What does the OBDII code P1BC2 indicate on a Chevrolet?

- The code P1BC2 indicates that there is an issue with the Hybrid/Electric Vehicle Battery 74 Circuit, specifically detecting high voltage which is outside the normal operating range.

2. What are common symptoms of the P1BC2 code in a Chevrolet?

- Symptoms can include reduced vehicle performance, the hybrid or electric drive system may enter a fail-safe mode, warning lights on the dashboard such as the check engine light or a hybrid system warning light, and possible inability to start the vehicle.

3. What can cause the P1BC2 code to appear in a Chevrolet?

- Causes can include faulty battery modules, damaged wiring or connectors in the battery circuit, problems with the battery management system, or issues with the vehicleâ€™s charging system.

4. How is the P1BC2 code diagnosed in a Chevrolet?

- Diagnosis typically involves using a scan tool to read the fault code and examining the battery and its associated circuits. This includes checking for any visible damage to wiring, testing the battery modules, and inspecting the connectors and grounds for corrosion or looseness.

5. What repairs can fix the P1BC2 code?

- Repairs might include replacing damaged or faulty battery modules, repairing or replacing damaged wiring or connectors, and possibly updating or recalibrating the battery management system software.

6. Is it safe to drive a Chevrolet with the P1BC2 code?

- It is generally not recommended to drive a vehicle with this code active as it can lead to reduced vehicle performance and potential safety issues due to the vehicle unexpectedly entering into a fail-safe mode.

7. How urgent is it to address the P1BC2 code in a Chevrolet?

- It is quite urgent to address this issue as it involves the high-voltage battery system, which is crucial for the proper functioning and safety of hybrid and electric vehicles.

8. Can the P1BC2 code affect the overall lifespan of a Chevrolet hybrid or electric vehicle battery?

- Yes, if not addressed promptly, the issues leading to the P1BC2 code can lead to further damage of the battery, potentially reducing its lifespan and effectiveness.

9. What tools are required to diagnose the P1BC2 code in a Chevrolet?

- Diagnostic requires a professional OBDII scanner, a digital multimeter, and possibly an insulation resistance tester to check the integrity of the high-voltage cables and components.

10. Are there any preventive measures to avoid the P1BC2 code in Chevrolet vehicles?

- Regular maintenance of the battery system, ensuring all firmware for the battery management system is up to date, and routinely checking the condition of the battery and its connections can help prevent this issue.