AutoCodes – Chevrolet – P1BCB Chevrolet

P1BCB Chevrolet Code - Hybrid/Electric Vehicle Battery 77 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: P1BCB Chevrolet indicates Hybrid/Electric Vehicle Battery 77 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 837

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 P1BCB 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 P1BCB Chevrolet - Hybrid/Electric Vehicle Battery 77 Circuit High Voltage - AutoCodes.com — P1BCB Chevrolet Code - Hybrid/Electric Vehicle Battery 77 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BCB Chevrolet?

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

How to Fix the DTC P1BCB 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 P1BCB 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 P1BCB Chevrolet Code

1. What are the common symptoms of OBDII code P1BCB for a Chevrolet Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Common symptoms include the check engine light illuminating, reduced fuel efficiency, and potential drivability issues.

2. What are the possible causes of the OBDII code P1BCB for a Chevrolet Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Possible causes may include a faulty battery pack, issues with high voltage wiring, a malfunctioning battery management system, or a problem with the hybrid control module.

3. How can I diagnose the OBDII code P1BCB in a Chevrolet Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to retrieve the fault code and then inspecting the battery pack, high voltage wiring, and related components for any visible damage or issues.

4. Is it safe to drive my Chevrolet Hybrid/Electric Vehicle with the OBDII code P1BCB present?

- It is not recommended to continue driving the vehicle with this code present, as high voltage issues can pose a safety risk. It is best to have the vehicle inspected and repaired as soon as possible.

5. What are some repair tips for fixing the OBDII code P1BCB in a Chevrolet Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring, replacing a faulty battery pack or components, updating software as needed, and ensuring proper connections and grounds.

6. Can I reset the OBDII code P1BCB in my Chevrolet Hybrid/Electric Vehicle on my own?

- While you can clear the code with a scan tool, it is important to address the underlying issue causing the code to prevent it from coming back. It is recommended to have the vehicle properly diagnosed and repaired.

7. Will the OBDII code P1BCB in a Chevrolet Hybrid/Electric Vehicle affect the vehicle's performance?

- Yes, this code can impact the vehicle's performance by causing drivability issues, reduced fuel efficiency, and potentially affecting the hybrid/electric system's operation.

8. How much does it typically cost to repair the OBDII code P1BCB in a Chevrolet Hybrid/Electric Vehicle?

- Repair costs can vary depending on the specific issue causing the code, parts needed for repair, and labor costs. It is advisable to consult with a qualified mechanic or dealership for an accurate estimate.

9. Can a DIY enthusiast with automotive knowledge fix the OBDII code P1BCB in a Chevrolet Hybrid/Electric Vehicle?

- While some repairs may be possible for experienced DIY enthusiasts, dealing with high voltage systems and complex hybrid components requires specialized knowledge and tools. It is best to seek professional help for this issue.

10. How often does the OBDII code P1BCB occur in Chevrolet Hybrid/Electric Vehicles?

- The occurrence of this code can vary, but it is not uncommon in hybrid/electric vehicles as it relates to high voltage system issues. Regular maintenance and careful driving can help prevent such codes from appearing.