AutoCodes – GMC – P1BC5 GMC

P1BC5 GMC Code - Hybrid/Electric Vehicle Battery 75 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: P1BC5 GMC indicates Hybrid/Electric Vehicle Battery 75 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 739

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 P1BC5 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 P1BC5 GMC - Hybrid/Electric Vehicle Battery 75 Circuit High Voltage - AutoCodes.com — P1BC5 GMC Code - Hybrid/Electric Vehicle Battery 75 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC5 GMC?

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

How to Fix the DTC P1BC5 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 P1BC5 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 P1BC5 GMC Code

1. What are the common symptoms of OBDII code P1BC5 in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced fuel efficiency, poor performance, and illuminated warning lights on the dashboard.

2. What are the possible causes of code P1BC5 indicating Hybrid/Electric Vehicle Battery 75 Circuit High Voltage in a GMC?

- The code can be triggered by issues such as a faulty battery module, damaged high voltage wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1BC5 related to high voltage circuit issues in my GMC Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the high voltage components for damage, and testing the battery modules for proper function.

4. Is it safe to continue driving my GMC Hybrid/Electric Vehicle with the P1BC5 trouble code present?

- It is not recommended to drive the vehicle with the code active, as it can lead to further damage to the high voltage system and potentially pose safety risks.

5. What are some repair tips for resolving the Hybrid/Electric Vehicle Battery 75 Circuit High Voltage fault code in a GMC?

- Repair tips may include checking and replacing damaged wiring, inspecting and replacing faulty battery modules, and resetting the fault code after repairs are completed.

6. Can resetting the OBDII code P1BC5 in my GMC Hybrid/Electric Vehicle fix the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying cause is not addressed, the code is likely to reappear.

7. Are there any safety precautions to keep in mind when working on high voltage components related to code P1BC5 in a GMC Hybrid/Electric Vehicle?

- It is crucial to follow manufacturer guidelines, wear appropriate personal protective equipment, and ensure the high voltage system is properly deactivated before attempting any repairs.

8. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 75 Circuit High Voltage fault code in a GMC?

- Repair costs can vary depending on the extent of the damage and parts needed, but it is advisable to consult with a professional technician for an accurate estimate.

9. Can a DIY enthusiast with knowledge of automotive repairs fix the P1BC5 code in a GMC Hybrid/Electric Vehicle?

- While some basic troubleshooting steps can be taken, dealing with high voltage systems and complex electrical components typically requires specialized training and equipment best left to professionals.

10. Is it possible for the OBDII code P1BC5 to be a false alarm in a GMC Hybrid/Electric Vehicle?

- While rare, false alarms can occur due to intermittent issues or sensor malfunctions, so it's recommended to verify the code with a thorough diagnostic check before proceeding with repairs.