AutoCodes – Chevrolet – P1B9E Chevrolet

P1B9E Chevrolet Code - Hybrid/Electric Vehicle Battery 62 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: P1B9E Chevrolet indicates Hybrid/Electric Vehicle Battery 62 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 946

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 P1B9E 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 P1B9E Chevrolet - Hybrid/Electric Vehicle Battery 62 Circuit High Voltage - AutoCodes.com — P1B9E Chevrolet Code - Hybrid/Electric Vehicle Battery 62 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B9E Chevrolet?

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

How to Fix the DTC P1B9E 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 P1B9E 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 P1B9E Chevrolet Code

1. What are the common symptoms of OBDII code P1B9E in a Chevrolet hybrid/electric vehicle?

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

2. What does the OBDII code P1B9E indicate in a Chevrolet hybrid/electric vehicle?

- The code P1B9E indicates a high voltage condition in the Hybrid/Electric Vehicle Battery 62 Circuit.

3. What are the possible causes of OBDII code P1B9E in a Chevrolet hybrid/electric vehicle?

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

4. How can I diagnose the OBDII code P1B9E in my Chevrolet hybrid/electric vehicle?

- Diagnosing the code may require the use of a professional OBDII scanner to read and interpret the specific fault codes related to the high voltage circuit.

5. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B9E present?

- It is not recommended to continue driving the vehicle with the code present, as it could lead to further damage to the hybrid/electric system.

6. How can I reset the OBDII code P1B9E in my Chevrolet hybrid/electric vehicle?

- Resetting the code may involve fixing the underlying issue causing the high voltage condition and then using an OBDII scanner to clear the code.

7. Can I repair the OBDII code P1B9E in my Chevrolet hybrid/electric vehicle myself?

- Repairing the code may require specialized knowledge and tools related to hybrid/electric vehicle systems, so it is best to consult a professional technician.

8. Are there any preventive maintenance tips to avoid OBDII code P1B9E in a Chevrolet hybrid/electric vehicle?

- Regularly servicing the hybrid/electric system, checking the battery health, and addressing any warning signs promptly can help prevent the occurrence of this code.

9. How much does it typically cost to repair OBDII code P1B9E in a Chevrolet hybrid/electric vehicle?

- Repair costs can vary depending on the extent of the issue, but it is recommended to get a diagnostic assessment from a qualified technician for an accurate estimate.

10. How long does it take to fix OBDII code P1B9E in a Chevrolet hybrid/electric vehicle?

- The repair time can vary based on the specific problem causing the code, so it is best to consult with a professional technician for an estimated timeframe.