AutoCodes – Cadillac – P1B54 Cadillac

P1B54 Cadillac Code - Hybrid/Electric Vehicle Battery 38 Circuit Performance

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: P1B54 Cadillac indicates Hybrid/Electric Vehicle Battery 38 Circuit Performance.
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 900

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B54 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 P1B54 Cadillac - Hybrid/Electric Vehicle Battery 38 Circuit Performance - AutoCodes.com — P1B54 Cadillac Code - Hybrid/Electric Vehicle Battery 38 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B54 Cadillac?

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

How to Fix the DTC P1B54 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 P1B54 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 P1B54 Cadillac Code

1. What are the common symptoms of OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential issues with the high-voltage battery.

2. What could cause the OBDII code P1B54 to trigger in a Cadillac Hybrid/Electric Vehicle?

- The code P1B54 typically indicates a performance issue with the Hybrid/Electric Vehicle Battery 38 Circuit, which may be caused by a faulty battery cell, wiring issues, or a problem with the battery management system.

3. How can I diagnose the OBDII code P1B54 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing the code P1B54 usually involves using a professional scan tool to retrieve the specific fault codes related to the high-voltage battery system, as well as conducting visual inspections of the battery connections and wiring.

4. What are some potential repair tips for resolving the OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring or connections, testing and potentially replacing faulty battery cells, and ensuring proper functioning of the battery management system.

5. Is it safe to continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P1B54 present?

- It is not recommended to continue driving the vehicle with the code P1B54 present, as it may lead to further damage to the high-voltage battery system and potentially compromise the safety and performance of the vehicle.

6. How much does it typically cost to repair the OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairing the code P1B54 can vary depending on the specific underlying issue, but it may involve expenses for parts replacement, labor costs, and potential diagnostic fees from a qualified technician.

7. Can I reset the OBDII code P1B54 in my Cadillac Hybrid/Electric Vehicle using a basic OBDII scanner?

- While you can attempt to clear the code using a basic OBDII scanner, it is important to address the root cause of the issue first to prevent the code from reoccurring. A professional diagnostic tool may provide more detailed information for proper repair.

8. Are there any preventive maintenance measures to avoid the OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- Regularly servicing and inspecting the high-voltage battery system, following recommended maintenance schedules, and addressing any warning signs promptly can help prevent issues leading to the code P1B54.

9. How long does it typically take to repair the OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- The repair time for the code P1B54 can vary depending on the complexity of the issue and availability of parts. It is advisable to consult with a professional technician for a more accurate estimate of repair time.

10. Can a DIY enthusiast with automotive knowledge repair the OBDII code P1B54 in a Cadillac Hybrid/Electric Vehicle?

- Repairing the code P1B54 may involve working with high-voltage components and specialized tools, so it is recommended to seek assistance from a qualified technician or specialized hybrid/electric vehicle repair shop to ensure proper diagnosis and repair.