AutoCodes – Buick – P1B1D Buick

P1B1D Buick Code - Hybrid/Electric Vehicle Battery 29 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: P1B1D Buick indicates Hybrid/Electric Vehicle Battery 29 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 927

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B1D Buick 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 P1B1D Buick - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage - AutoCodes.com — P1B1D Buick Code - Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1D Buick?

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

How to Fix the DTC P1B1D Buick?

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 P1B1D Buick 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 P1B1D Buick Code

1. What are the common symptoms of OBDII code P1B1D in a Buick Hybrid/Electric Vehicle?

- Common symptoms include decreased hybrid system performance, reduced fuel efficiency, and potential illumination of the check engine light.

2. What can cause the OBDII code P1B1D indicating Hybrid/Electric Vehicle Battery 29 Circuit Low Voltage in a Buick?

- This code is typically triggered by issues such as a faulty battery, damaged battery wiring, poor battery connections, or issues with the battery management system.

3. How serious is the P1B1D code related to low voltage in the Hybrid/Electric Vehicle Battery 29 circuit?

- Ignoring this code can lead to further damage to the hybrid/electric vehicle battery system, reduced performance, and potentially unsafe driving conditions. It is recommended to address this issue promptly.

4. Can I continue driving my Buick if the P1B1D code is present?

- It is not advisable to continue driving the vehicle with the P1B1D code active, as it can lead to more severe problems with the hybrid/electric system. It is recommended to have the vehicle inspected and repaired as soon as possible.

5. How can I diagnose and repair the OBDII code P1B1D in my Buick Hybrid/Electric Vehicle?

- Diagnosing and repairing this code usually involves checking the battery health, inspecting the battery connections and wiring, and testing the battery management system. It is recommended to consult a qualified mechanic or dealership for accurate diagnosis and repair.

6. Is it possible to reset the P1B1D code in a Buick Hybrid/Electric Vehicle without fixing the underlying issue?

- While it is possible to clear the code temporarily, the underlying issue causing the low voltage in the battery circuit must be addressed to prevent the code from reoccurring. Resetting the code without fixing the problem will not resolve the issue.

7. Can extreme weather conditions contribute to triggering the P1B1D code in a Buick Hybrid/Electric Vehicle?

- Yes, extreme weather conditions such as extreme cold or heat can impact the performance of the hybrid/electric vehicle battery, potentially leading to low voltage issues and triggering the P1B1D code.

8. Are there any preventative maintenance tips to avoid the occurrence of the P1B1D code in a Buick Hybrid/Electric Vehicle?

- Regularly inspecting the battery connections, ensuring proper charging habits, and avoiding extreme temperature exposure can help prevent issues that may trigger the P1B1D code related to low voltage in the battery circuit.

9. How much does it typically cost to repair the OBDII code P1B1D in a Buick Hybrid/Electric Vehicle?

- The cost of repairing the P1B1D code can vary depending on the exact cause of the issue. It is recommended to obtain a diagnosis from a professional technician to determine the specific repair costs.

10. Can a DIY enthusiast with automotive knowledge fix the P1B1D code issue in a Buick Hybrid/Electric Vehicle?

- While some basic troubleshooting and inspections can be performed by DIY enthusiasts, diagnosing and repairing the P1B1D code related to low voltage in the battery circuit usually requires specialized equipment and expertise. It is advisable to seek professional help for accurate diagnosis and repair.