AutoCodes – GMC – P1B54 GMC

P1B54 GMC 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 GMC 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 1,004

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 GMC 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 GMC - Hybrid/Electric Vehicle Battery 38 Circuit Performance - AutoCodes.com — P1B54 GMC Code - Hybrid/Electric Vehicle Battery 38 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B54 GMC?

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

How to Fix the DTC P1B54 GMC?

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 GMC 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 GMC Code

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

- Common symptoms include decreased fuel efficiency, poor acceleration, and potential illumination of the check engine light.

2. What does the OBDII code P1B54 GMC indicate about the Hybrid/Electric Vehicle battery 38 circuit performance?

- The code suggests an issue with the performance of the 38th circuit in the Hybrid/Electric Vehicle battery system.

3. What are the possible causes of OBDII code P1B54 in a GMC Hybrid/Electric Vehicle?

- Potential causes include a faulty battery cell, wiring issues in the circuit, or a malfunctioning battery management system.

4. How can I diagnose the problem related to code P1B54 in my GMC Hybrid/Electric Vehicle?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific code, checking the battery connections, and inspecting the circuit for any visible damage.

5. Can I continue driving my GMC Hybrid/Electric Vehicle with OBDII code P1B54 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the battery system and potentially impact vehicle performance.

6. How can I repair OBDII code P1B54 in my GMC Hybrid/Electric Vehicle?

- Repair options may include replacing the faulty battery cell, repairing damaged wiring, or recalibrating the battery management system as needed.

7. Is it necessary to reset the OBDII code P1B54 after repairing the issue in a GMC Hybrid/Electric Vehicle?

- Yes, it is important to clear the code using a diagnostic scanner after resolving the underlying problem to reset the vehicle's system and turn off the check engine light.

8. Are there any preventative maintenance tips to avoid encountering OBDII code P1B54 in a GMC Hybrid/Electric Vehicle?

- Regularly inspecting the battery system, following the manufacturer's maintenance schedule, and addressing any warning signs promptly can help prevent this code from appearing.

9. Can a DIY enthusiast tackle the repair of OBDII code P1B54 in a GMC Hybrid/Electric Vehicle?

- While some simple checks and repairs can be done by DIY enthusiasts, diagnosing and repairing complex battery system issues may require specialized knowledge and tools best handled by professionals.

10. How critical is it to address OBDII code P1B54 promptly in a GMC Hybrid/Electric Vehicle?

- It is crucial to address this code promptly to prevent further damage to the battery system, ensure optimal vehicle performance, and avoid potential safety hazards associated with a malfunctioning battery circuit.