AutoCodes – Generic – P1BD0

P1BD0 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 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.

Save to My Repairs My Repairs

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

Code Popularity 723

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

What does this mean?

What are the Possible Causes of the DTC P1BD0?

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

How to Fix the DTC P1BD0?

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 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 P1BD0 code?

Need more information on how to fix the P1BD0 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BD0 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BD0 Buick — Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage
P1BD0 Cadillac — Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage
P1BD0 Chevrolet — Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage
P1BD0 GMC — Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage
P1BD0 Saturn — Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage

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 Code

1. What does OBDII code P1BD0 mean?

P1BD0 indicates a low voltage issue in the Hybrid/Electric Vehicle Battery 79 circuit, which is related to the high-voltage battery monitoring system.

2. What are the common symptoms of P1BD0?

Symptoms may include a check engine light, reduced performance, limited electric mode operation, or warning messages about the hybrid system.

3. What causes the P1BD0 code?

The code is typically caused by issues such as a faulty battery module, damaged wiring or connectors in the circuit, or a malfunctioning battery management system.

4. Can I still drive my vehicle with the P1BD0 code?

While the vehicle may still be drivable, it could experience reduced performance or efficiency. It's best to address the issue promptly to avoid further damage.

5. How is P1BD0 diagnosed?

A technician will use a scan tool to confirm the code, check the battery management system for additional codes, and inspect the circuit wiring, connectors, and battery module for faults.

6. What repairs are commonly needed for the P1BD0 code?

Repairs may include replacing a faulty battery module, repairing damaged wiring or connectors, or reprogramming the battery control module if necessary.

7. How much does it cost to fix the P1BD0 code?

Repair costs vary depending on the issue. Replacing a battery module can be expensive, while fixing wiring or connectors is generally less costly.

8. Can a low 12V battery cause the P1BD0 code?

A low 12V battery is unlikely to cause this specific code, as it relates to the high-voltage hybrid battery system.

9. How can I prevent the P1BD0 code from occurring?

Routine maintenance, inspecting connectors for corrosion, and ensuring the battery cooling system is functioning properly can help prevent this issue.

10. Does the P1BD0 code mean my hybrid battery needs replacement?

Not necessarily. The issue may be isolated to a specific battery module or circuit component rather than the entire battery pack. A proper diagnosis is essential.