AutoCodes – Chevrolet – P1B9D Chevrolet

P1B9D Chevrolet Code - Hybrid/Electric Vehicle Battery 62 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: P1B9D Chevrolet indicates Hybrid/Electric Vehicle Battery 62 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 810

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 P1B9D 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 P1B9D Chevrolet - Hybrid/Electric Vehicle Battery 62 Circuit Low Voltage - AutoCodes.com — P1B9D Chevrolet Code - Hybrid/Electric Vehicle Battery 62 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B9D Chevrolet?

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

How to Fix the DTC P1B9D 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 P1B9D 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 P1B9D Chevrolet Code

1. What are the common symptoms of OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- Common symptoms include poor fuel efficiency, reduced power output, and difficulty starting the vehicle.

2. What can cause the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- This code is typically triggered by issues such as a weak or failing hybrid/electric vehicle battery, damaged battery wiring, or a faulty battery management system.

3. How serious is the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- This code indicates a low voltage issue with the hybrid/electric vehicle battery, which can lead to poor performance and potential safety hazards. It is important to address this issue promptly.

4. What are some repair tips for fixing the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- Some repair tips include checking the battery connections for corrosion, testing the battery voltage, inspecting the battery wiring for damage, and ensuring proper functioning of the battery management system.

5. Can I drive my Chevrolet Hybrid/Electric Vehicle with the OBDII code P1B9D present?

- It is not recommended to drive the vehicle with this code present, as it may lead to further damage to the hybrid/electric vehicle system. It is best to have the issue diagnosed and repaired as soon as possible.

6. How can I prevent the OBDII code P1B9D from appearing in my Chevrolet Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric vehicle battery, including monitoring its voltage levels and ensuring proper connections, can help prevent this code from appearing.

7. Is it safe to continue using the hybrid/electric features of my Chevrolet vehicle with the OBDII code P1B9D?

- It is not advisable to continue using the hybrid/electric features of the vehicle if this code is present, as it indicates a low voltage issue that can affect the performance and safety of the vehicle.

8. How long does it typically take to repair the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like cleaning battery connections may take a short time, while more complex issues may require more extensive troubleshooting and repair.

9. Can a DIY enthusiast fix the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- While some basic checks like inspecting battery connections can be done by a DIY enthusiast, diagnosing and repairing more complex issues related to this code may require professional expertise and specialized tools.

10. How much does it cost to repair the OBDII code P1B9D in a Chevrolet Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the extent of the issue and the specific repairs needed. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.