AutoCodes – Generic – P1B6D

P1B6D Code - Hybrid/Electric Vehicle Battery 46 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: P1B6D indicates Hybrid/Electric Vehicle Battery 46 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 805

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 P1B6D 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 P1B6D - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage - AutoCodes.com — P1B6D Code - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6D?

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

How to Fix the DTC P1B6D?

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 P1B6D 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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Information for Specific Makes

P1B6D Buick — Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage
P1B6D Cadillac — Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage
P1B6D Chevrolet — Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage
P1B6D GMC — Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage
P1B6D Saturn — Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage

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 P1B6D Code

1. What are the common symptoms of OBDII code P1B6D (Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage)?

- Common symptoms include poor fuel economy, reduced power or acceleration, illuminated warning lights (such as the hybrid system warning light), and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B6D?

- The code P1B6D can be triggered by issues with the hybrid/electric vehicle battery 46 circuit, such as a faulty battery cell, wiring issues, a defective battery management system, or a problem with the battery control module.

3. How can I diagnose the cause of OBDII code P1B6D?

- Diagnosing the cause of P1B6D typically requires using a professional diagnostic scan tool to retrieve the specific fault codes related to the hybrid/electric vehicle battery. Additionally, a thorough inspection of the battery components and related wiring may be necessary.

4. Is it safe to continue driving with OBDII code P1B6D present?

- It is not recommended to continue driving with code P1B6D present, as it can lead to further damage to the hybrid/electric vehicle's battery system and potentially result in a loss of power while driving.

5. Can I reset OBDII code P1B6D myself?

- While you can clear the code using a diagnostic scan tool, it is important to address the underlying issue causing the fault code to prevent it from recurring. Resetting the code without fixing the problem may lead to ongoing issues with the hybrid/electric vehicle battery system.

6. How can I repair OBDII code P1B6D at home?

- Repairing code P1B6D often requires specialized knowledge and tools, making it challenging to address at home. It is recommended to seek assistance from a qualified mechanic or dealership specializing in hybrid/electric vehicle repairs.

7. What is the typical cost to repair OBDII code P1B6D?

- The cost to repair code P1B6D can vary depending on the specific cause of the issue. Repairs may range from a few hundred dollars for minor fixes such as wiring repairs to several thousand dollars for more extensive battery system replacements.

8. How can I prevent OBDII code P1B6D from occurring in the future?

- To prevent code P1B6D from occurring in the future, it is important to follow the manufacturer's recommended maintenance schedule for the hybrid/electric vehicle battery system. Regular inspections and servicing can help identify potential issues before they trigger fault codes.

9. Can extreme weather conditions contribute to triggering OBDII code P1B6D?

- Yes, extreme weather conditions, such as very high or low temperatures, can potentially impact the performance of the hybrid/electric vehicle battery system and contribute to triggering fault codes like P1B6D. Proper storage and care during extreme weather can help mitigate these issues.

10. Is code P1B6D a common issue in hybrid/electric vehicles?

- While not as common as some other OBDII codes, P1B6D can occur in hybrid/electric vehicles due to various factors affecting the battery system. Regular maintenance and prompt attention to warning signs can help prevent this issue.