AutoCodes – Cadillac – P1B6A Cadillac

P1B6A Cadillac Code - Hybrid/Electric Vehicle Battery 45 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: P1B6A Cadillac indicates Hybrid/Electric Vehicle Battery 45 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 789

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 P1B6A Cadillac 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 P1B6A Cadillac - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage - AutoCodes.com — P1B6A Cadillac Code - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6A Cadillac?

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

How to Fix the DTC P1B6A Cadillac?

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 P1B6A Cadillac 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 P1B6A Cadillac Code

1. What are common symptoms of OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

When this code is triggered, you may experience issues such as reduced power, poor fuel efficiency, and the vehicle going into a reduced power mode.

2. What can cause the OBDII code P1B6A to appear in a Cadillac hybrid/electric vehicle?

The code P1B6A typically indicates a low voltage condition in the Hybrid/Electric Vehicle Battery 45 circuit, which can be caused by a faulty battery, damaged wiring, or a problem with the battery management system.

3. How serious is the OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

This code should be addressed promptly as it can affect the performance and efficiency of the vehicle. Ignoring the issue may lead to further damage to the hybrid/electric system.

4. Can I continue driving my Cadillac with the OBDII code P1B6A present?

It is not recommended to continue driving the vehicle with this code active, as it can lead to more severe issues and potential safety hazards. It's best to have the vehicle inspected and repaired as soon as possible.

5. How can I diagnose the cause of OBDII code P1B6A in my Cadillac hybrid/electric vehicle?

Diagnosing this code usually requires specialized diagnostic equipment to test the battery, wiring, and battery management system. A professional technician with experience in hybrid/electric vehicles can help pinpoint the exact cause.

6. Is it possible to reset the OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

While clearing the code may temporarily turn off the warning light, it is important to address the underlying issue causing the code to prevent further problems. Resetting the code without addressing the root cause can lead to recurring issues.

7. Can a DIY enthusiast repair OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

Repairing this code may require specialized knowledge and tools related to hybrid/electric vehicle systems. It is recommended to seek assistance from a qualified technician familiar with these systems for proper diagnosis and repair.

8. What are the typical repair options for OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring, or addressing issues with the battery management system. The exact repair needed will depend on the specific cause of the low voltage condition.

9. How can regular maintenance help prevent OBDII code P1B6A in a Cadillac hybrid/electric vehicle?

Regular maintenance, such as checking the battery health, monitoring the charging system, and addressing any warning lights promptly, can help prevent issues like code P1B6A from occurring in a Cadillac hybrid/electric vehicle.

10. Is there a warranty or recall for OBDII code P1B6A in Cadillac hybrid/electric vehicles?

Depending on the vehicle's age, mileage, and warranty coverage, there may be manufacturer recalls or warranties that cover issues related to code P1B6A. It is advisable to check with a Cadillac dealership or the manufacturer for any applicable warranty or recall information.