AutoCodes – Cadillac – P1BD0 Cadillac

P1BD0 Cadillac 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 Cadillac 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 857

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

What does this mean?

What are the Possible Causes of the DTC P1BD0 Cadillac?

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

How to Fix the DTC P1BD0 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P1BD0 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms may include reduced power, decreased fuel efficiency, and issues with starting the vehicle.

2. What are the possible causes of OBDII code P1BD0 indicating Hybrid/Electric Vehicle Battery 79 Circuit Low Voltage in a Cadillac?

- The code could be triggered by a faulty battery cell, a weak hybrid battery pack, a malfunctioning battery management system, or issues with the charging system.

3. How can I diagnose the root cause of OBDII code P1BD0 in my Cadillac Hybrid/Electric Vehicle?

- It is recommended to perform a thorough inspection of the hybrid battery pack, test the individual battery cells, check the connections, and scan the battery management system for any fault codes.

4. Can I continue driving my Cadillac with OBDII code P1BD0 present?

- It is not advisable to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system.

5. What are some repair tips for resolving OBDII code P1BD0 in a Cadillac Hybrid/Electric Vehicle?

- Repair options may include replacing the faulty battery cell, repairing the battery management system, recalibrating the hybrid system, or seeking professional assistance from a certified technician.

6. How much does it typically cost to repair OBDII code P1BD0 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repair can vary depending on the specific issue causing the code, but it is recommended to budget for potential battery replacements or system repairs, which can range from a few hundred to several thousand dollars.

7. Are there any common DIY solutions for fixing OBDII code P1BD0 in a Cadillac Hybrid/Electric Vehicle?

- DIY solutions are limited for this code, as it often requires specialized equipment and knowledge of hybrid/electric vehicle systems. It is best to consult with a professional technician for proper diagnosis and repair.

8. How can I prevent OBDII code P1BD0 from recurring in my Cadillac Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric system, monitoring the battery health, and addressing any warning signs promptly can help prevent the recurrence of this code.

9. Is OBDII code P1BD0 specific to Cadillac vehicles only?

- While the specific code may vary by manufacturer, similar codes related to low voltage in the hybrid/electric system can be found in other hybrid/electric vehicles as well.

10. Can OBDII code P1BD0 be cleared/reset without repairs in a Cadillac Hybrid/Electric Vehicle?

- Clearing the code without addressing the underlying issue may temporarily eliminate the warning light, but the problem will likely resurface. It is recommended to diagnose and repair the root cause of the code.