AutoCodes – Chevrolet – P0B9C Chevrolet

P0B9C Chevrolet Code - Hybrid/Electric Vehicle Battery 20 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: P0B9C Chevrolet indicates Hybrid/Electric Vehicle Battery 20 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 910

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B9C 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 P0B9C Chevrolet - Hybrid/Electric Vehicle Battery 20 Circuit Low Voltage - AutoCodes.com — P0B9C Chevrolet Code - Hybrid/Electric Vehicle Battery 20 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B9C Chevrolet?

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

How to Fix the DTC P0B9C 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 P0B9C 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 P0B9C Chevrolet Code

1. What are the common symptoms of OBDII code P0B9C in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What does the OBDII code P0B9C indicating "Hybrid/Electric Vehicle Battery 20 Circuit Low Voltage" mean for a Chevrolet vehicle?

- This code indicates that there is a low voltage condition detected in the circuit related to the hybrid/electric vehicle battery 20.

3. What are some possible causes of OBDII code P0B9C in a Chevrolet hybrid/electric vehicle?

- Possible causes include a faulty hybrid/electric vehicle battery, issues with battery connections, damaged wiring in the battery circuit, or a malfunctioning battery management system.

4. How can I diagnose and repair OBDII code P0B9C in my Chevrolet hybrid/electric vehicle?

- Diagnosis involves checking the hybrid/electric vehicle battery, inspecting battery connections and wiring, and testing the battery management system. Repair may involve replacing the battery, repairing damaged wiring, or recalibrating the battery management system.

5. Is it safe to continue driving with OBDII code P0B9C present in a Chevrolet hybrid/electric vehicle?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the hybrid/electric vehicle system and potentially result in complete system failure.

6. Can I reset the OBDII code P0B9C in my Chevrolet hybrid/electric vehicle using a diagnostic scanner?

- Yes, you can reset the code using a diagnostic scanner. However, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P0B9C in a Chevrolet hybrid/electric vehicle?

- The cost of repair can vary depending on the specific issue causing the code. It is recommended to consult with a professional mechanic for an accurate diagnosis and cost estimate.

8. Are there any preventive maintenance tips to avoid OBDII code P0B9C in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting the hybrid/electric vehicle battery, maintaining proper battery connections, and following the manufacturer's recommended maintenance schedule can help prevent this code from appearing.