AutoCodes – Chevrolet – P1B9C Chevrolet

P1B9C Chevrolet Code - Hybrid/Electric Vehicle Battery 62 Circuit Performance

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: P1B9C Chevrolet indicates Hybrid/Electric Vehicle Battery 62 Circuit Performance.
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 866

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 P1B9C 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 P1B9C Chevrolet - Hybrid/Electric Vehicle Battery 62 Circuit Performance - AutoCodes.com — P1B9C Chevrolet Code - Hybrid/Electric Vehicle Battery 62 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B9C Chevrolet?

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

How to Fix the DTC P1B9C 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 P1B9C 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 P1B9C Chevrolet Code

1. What are the common symptoms of OBDII code P1B9C 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 typically causes the OBDII code P1B9C related to Hybrid/Electric Vehicle Battery 62 Circuit Performance in a Chevrolet?

- The code is usually triggered by issues with the hybrid/electric vehicle battery 62 circuit, such as a faulty battery cell, wiring problems, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1B9C in my Chevrolet hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, followed by inspecting the hybrid/electric vehicle battery 62 circuit components for any visible damage or issues.

4. Is it safe to continue driving my Chevrolet with the OBDII code P1B9C present?

- It is generally not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the hybrid/electric system and potentially compromise safety.

5. Can I repair the OBDII code P1B9C issue in my Chevrolet hybrid/electric vehicle myself?

- Repairing this code often requires specialized knowledge and equipment, so it is recommended to seek assistance from a certified technician or dealership familiar with hybrid/electric vehicle systems.

6. Will resetting the check engine light resolve the OBDII code P1B9C problem in my Chevrolet?

- Resetting the check engine light may temporarily clear the code, but the underlying issue causing the P1B9C code will likely persist and trigger the light to come back on.

7. Are there any preventive maintenance tips to avoid encountering the OBDII code P1B9C in my Chevrolet hybrid/electric vehicle?

- Regularly scheduled maintenance, including battery health checks and software updates, can help prevent issues leading to the P1B9C code in a Chevrolet hybrid/electric vehicle.

8. How much does it typically cost to repair the OBDII code P1B9C related to Hybrid/Electric Vehicle Battery 62 Circuit Performance in a Chevrolet?

- Repair costs can vary depending on the extent of the issue, but they may range from a few hundred to a few thousand dollars, especially if battery replacement or major repairs are needed.

9. Can the OBDII code P1B9C in a Chevrolet hybrid/electric vehicle be a recurring problem?

- Yes, if the root cause of the issue is not properly addressed, the P1B9C code can reoccur, leading to ongoing performance issues and potential safety concerns.

10. How long can I safely drive my Chevrolet with the OBDII code P1B9C before getting it repaired?

- It is best to address the P1B9C code as soon as possible to avoid further damage to the hybrid/electric system. Driving with the code present for an extended period is not recommended.