AutoCodes – Buick – P1BD1 Buick

P1BD1 Buick Code - Hybrid/Electric Vehicle Battery 79 Circuit High 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: P1BD1 Buick indicates Hybrid/Electric Vehicle Battery 79 Circuit High 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 917

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1BD1 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 P1BD1 Buick - Hybrid/Electric Vehicle Battery 79 Circuit High Voltage - AutoCodes.com — P1BD1 Buick Code - Hybrid/Electric Vehicle Battery 79 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD1 Buick?

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

How to Fix the DTC P1BD1 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 P1BD1 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.

Need more information about the P1BD1 Buick code?

Need more information on how to fix the P1BD1 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BD1 Buick code diagnosed by a professional: Find a repair shop in your area

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 P1BD1 Buick Code

1. What does the OBDII code P1BD1 mean for a Buick?

P1BD1 indicates a "Hybrid/Electric Vehicle Battery 79 Circuit High Voltage" issue, meaning the voltage in the specified battery circuit is higher than expected.

2. What are the common symptoms of code P1BD1 in a Buick?

Symptoms may include the check engine light turning on, reduced hybrid or EV performance, charging issues, and potential vehicle stalling or failure to start.

3. What causes the P1BD1 code to trigger in a Buick?

Common causes include a faulty hybrid battery module, damaged wiring or connectors in the circuit, or a malfunctioning battery control module.

4. Can I drive my Buick with the P1BD1 code active?

Driving with this code is not recommended, as it could lead to further damage to the hybrid system and reduced vehicle safety or performance.

5. How can I diagnose the P1BD1 code in my Buick?

Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the hybrid battery and related wiring, and testing the voltage levels in the affected circuit.

6. What repairs are typically needed to fix the P1BD1 code?

Repairs may include replacing the hybrid battery module, repairing damaged wiring or connectors, or reprogramming/updating the battery control module.

7. How much does it cost to fix the P1BD1 code on a Buick?

Costs vary but may range from $200 for wiring repairs to several thousand dollars if the hybrid battery needs replacement.

8. Can a weak 12-volt battery cause the P1BD1 code on a Buick?

While unlikely, a weak 12-volt battery can sometimes affect hybrid system diagnostics, so testing it is a good first step during troubleshooting.

9. Does the P1BD1 code indicate a total hybrid battery failure?

Not necessarily. It may indicate an issue with a specific cell or circuit in the battery, which could be repairable without replacing the entire battery.

10. Do I need a professional to fix the P1BD1 code on my Buick?

Yes, due to the high voltage in hybrid systems, repairs should be handled by a qualified technician to ensure safety and proper diagnosis.