AutoCodes – Buick – P1BD0 Buick

P1BD0 Buick Code - Hybrid/Electric Vehicle Battery 79 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: P1BD0 Buick indicates Hybrid/Electric Vehicle Battery 79 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 771

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 P1BD0 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 P1BD0 Buick - Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage - AutoCodes.com — P1BD0 Buick Code - Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD0 Buick?

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

How to Fix the DTC P1BD0 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 P1BD0 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 P1BD0 Buick Code

1. What does the OBDII code P1BD0 mean on a Buick?

P1BD0 refers to "Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage," indicating a low voltage issue in the circuit for battery module 79 in the hybrid or electric vehicle system.

2. What are the common symptoms of a P1BD0 code on a Buick?

Symptoms may include a check engine light, reduced fuel efficiency, limited electric vehicle mode, diminished acceleration, or the vehicle entering limp mode.

3. What causes the P1BD0 code to appear on a Buick?

Common causes include a faulty battery module, damaged wiring or connectors in the battery circuit, poor ground connections, or an issue with the battery management system.

4. Can a P1BD0 code damage my vehicle if ignored?

Yes, ignoring this code can lead to further damage to the hybrid/electric battery system and may reduce vehicle performance or cause a complete system failure.

5. How do you diagnose a P1BD0 code on a Buick?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the battery module 79 circuit, checking for damaged wiring or loose connections, and testing the voltage and continuity of the circuit.

6. Can I drive my Buick with a P1BD0 code?

Driving with a P1BD0 code is not recommended, as it may cause further issues in the hybrid/electric system or lead to reduced performance and efficiency.

7. How is the P1BD0 code fixed on a Buick?

Repairs may involve replacing a faulty battery module, repairing or replacing damaged wiring, cleaning or tightening connectors, or updating the battery management system software.

8. Is the P1BD0 code covered under warranty for my Buick?

Coverage depends on your vehicleâ€™s warranty terms, specifically the hybrid or electric battery warranty, which often extends longer than the standard warranty.

9. Can a dead 12-volt battery cause the P1BD0 code?

While a dead 12-volt battery is unlikely to directly cause the P1BD0 code, it may contribute to related issues in the hybrid/electric system that could trigger the code.

10. How much does it cost to fix a P1BD0 code on a Buick?

The repair cost varies widely depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 for replacing a hybrid battery module.