AutoCodes – Cadillac – P1BD4 Cadillac

P1BD4 Cadillac Code - Hybrid/Electric Vehicle Battery 80 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: P1BD4 Cadillac indicates Hybrid/Electric Vehicle Battery 80 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.

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Code Popularity 770

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 P1BD4 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 P1BD4 Cadillac - Hybrid/Electric Vehicle Battery 80 Circuit High Voltage - AutoCodes.com — P1BD4 Cadillac Code - Hybrid/Electric Vehicle Battery 80 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD4 Cadillac?

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

How to Fix the DTC P1BD4 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 P1BD4 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 P1BD4 Cadillac Code

1. What are common symptoms of OBDII code P1BD4 in a Cadillac hybrid/electric vehicle?

- Common symptoms include check engine light illumination, reduced power performance, and potential issues with starting the vehicle.

2. What can cause the OBDII code P1BD4 to trigger in a Cadillac hybrid/electric vehicle?

- The code P1BD4 typically triggers due to a high voltage condition detected in the Hybrid/Electric Vehicle Battery 80 Circuit.

3. How serious is the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle?

- The code P1BD4 should be addressed promptly as it indicates a potential high voltage issue in the vehicle's battery system, which can impact safety and performance.

4. Can I continue driving my Cadillac hybrid/electric vehicle with the OBDII code P1BD4 present?

- It is not recommended to continue driving the vehicle with the code P1BD4 present, as it may lead to further damage to the battery system or other components.

5. What are some DIY repair tips for the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle?

- DIY repair for code P1BD4 is not recommended due to the complexity of the hybrid/electric vehicle battery system. It is best to seek professional assistance.

6. How can a mechanic diagnose the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle?

- A mechanic can diagnose the code P1BD4 using a scan tool to read the specific fault codes and then perform further testing on the Hybrid/Electric Vehicle Battery 80 Circuit.

7. Is it safe to reset the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle without fixing the underlying issue?

- It is not safe to simply reset the code without addressing the underlying issue, as it may lead to potential safety hazards or further damage to the vehicle.

8. Are there any recalls or technical service bulletins related to the OBDII code P1BD4 in Cadillac hybrid/electric vehicles?

- It is recommended to check with Cadillac dealerships or online resources for any recalls or technical service bulletins related to the OBDII code P1BD4 in specific Cadillac models.

9. How much does it cost to repair the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle?

- The cost of repairing the OBDII code P1BD4 can vary depending on the extent of the issue, parts needed, and labor costs. It is best to consult with a professional for an accurate estimate.

10. Can the OBDII code P1BD4 in a Cadillac hybrid/electric vehicle be prevented?

- While some instances of code P1BD4 may be unavoidable due to electrical issues, regular maintenance and timely inspections of the battery system can help prevent such issues from occurring.