AutoCodes – Buick – P1BDC Buick

P1BDC Buick Code - Hybrid/Electric Vehicle Battery 83 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: P1BDC Buick indicates Hybrid/Electric Vehicle Battery 83 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 769

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BDC 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 P1BDC Buick - Hybrid/Electric Vehicle Battery 83 Circuit Low Voltage - AutoCodes.com — P1BDC Buick Code - Hybrid/Electric Vehicle Battery 83 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BDC Buick?

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

How to Fix the DTC P1BDC 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 P1BDC 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 P1BDC Buick Code

1. What does the OBDII code P1BDC mean for a Buick?

P1BDC indicates a "Hybrid/Electric Vehicle Battery 83 Circuit Low Voltage," meaning the vehicle's system has detected a low voltage issue in a specific battery circuit.

2. What are the common symptoms of code P1BDC in a Buick?

Symptoms may include an illuminated check engine light, reduced hybrid system performance, lower fuel efficiency, or the vehicle entering a limited power mode.

3. What causes the P1BDC code in a Buick?

Common causes include a faulty battery module, damaged or corroded wiring, a defective battery control module, or issues with connectors in the circuit.

4. Can the P1BDC code cause drivability issues?

Yes, it can lead to reduced power output, limited use of the hybrid system, or even prevent the vehicle from operating in electric mode.

5. How is the P1BDC code diagnosed?

A technician will use a scan tool to retrieve the code, inspect the hybrid battery circuits, check for damaged wiring or connectors, and test the voltage levels of the affected circuit.

6. Can I drive my Buick with the P1BDC code?

While it may be possible, driving with this code can strain the hybrid system and potentially cause more damage. It's best to address the issue promptly.

7. What repairs are needed to fix the P1BDC code?

Repairs may include replacing the faulty battery module, repairing or replacing damaged wiring or connectors, or recalibrating the battery control module.

8. Is the P1BDC code covered under warranty for a Buick?

Hybrid-related components may be covered under the hybrid system or emissions warranty. Check with your dealership for specific coverage details.

9. How much does it cost to fix the P1BDC code on a Buick?

Repair costs can vary widely depending on the exact cause, ranging from $100 for minor wiring repairs to over $1,000 for battery module replacement.

10. Can a low 12V auxiliary battery cause the P1BDC code?

No, this code specifically relates to the hybrid battery system, not the 12V auxiliary battery. However, a failing 12V battery can cause other hybrid-related issues.