AutoCodes – Cadillac – P1B6D Cadillac

P1B6D Cadillac 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 Cadillac 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 755

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

What does this mean?

What are the Possible Causes of the DTC P1B6D Cadillac?

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

How to Fix the DTC P1B6D 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 P1B6D 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 P1B6D Cadillac Code

1. What are the common symptoms of OBDII code P1B6D in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms may include reduced hybrid system performance, decreased fuel efficiency, and potential issues with battery charging.

2. What can cause the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in a Cadillac?

- The code P1B6D can be triggered by issues such as a weak or failing hybrid battery, faulty battery control module, or problems with the battery cooling system.

3. How serious is the P1B6D code in a Cadillac Hybrid/Electric Vehicle?

- The code indicates a low voltage issue in the hybrid/electric vehicle battery system, which can affect the vehicle's overall performance and efficiency. It is important to address this issue promptly.

4. Can I continue driving my Cadillac with the P1B6D code present?

- It is not recommended to continue driving the vehicle with the P1B6D code active, as it can lead to further damage to the hybrid/electric vehicle battery system.

5. How can I diagnose and repair the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in my Cadillac?

- Diagnosis typically involves checking the battery voltage levels, inspecting the battery connections, and testing the battery control module. Repairs may involve replacing the hybrid battery or addressing any underlying issues.

6. Are there any DIY tips for troubleshooting the P1B6D code in a Cadillac?

- DIY troubleshooting for the P1B6D code may include checking for loose battery connections, ensuring proper battery cooling, and monitoring battery performance indicators.

7. How much does it cost to repair the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in a Cadillac?

- The cost of repairing the P1B6D code can vary depending on the root cause of the issue, but it may involve battery replacement, module repairs, or system diagnostics by a qualified technician.

8. Can a regular mechanic fix the P1B6D code in a Cadillac Hybrid/Electric Vehicle?

- Due to the specialized nature of hybrid/electric vehicle systems, it is recommended to have the P1B6D code diagnosed and repaired by a mechanic with expertise in these systems.

9. Will resetting the OBDII code P1B6D in my Cadillac make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the P1B6D code is not addressed, it is likely to return.

10. How can I prevent the recurrence of the Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage code in my Cadillac?

- Regular maintenance of the hybrid/electric vehicle battery system, including monitoring battery health, maintaining proper cooling, and addressing any warning signs promptly, can help prevent the P1B6D code from reoccurring.