AutoCodes – GMC – P1BCF GMC

P1BCF GMC Code - Hybrid/Electric Vehicle Battery 79 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: P1BCF GMC indicates Hybrid/Electric Vehicle Battery 79 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 750

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 P1BCF 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 P1BCF GMC - Hybrid/Electric Vehicle Battery 79 Circuit Performance - AutoCodes.com — P1BCF GMC Code - Hybrid/Electric Vehicle Battery 79 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BCF GMC?

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

How to Fix the DTC P1BCF 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 P1BCF 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 P1BCF GMC Code

1. What are the common symptoms of OBDII code P1BCF GMC (Hybrid/Electric Vehicle Battery 79 Circuit Performance)?

- Common symptoms include reduced hybrid battery performance, decreased fuel efficiency, and possible illumination of the check engine light.

2. What can cause the OBDII code P1BCF GMC to trigger?

- This code is typically triggered by issues such as a faulty hybrid/electric vehicle battery, damaged battery cells, wiring problems, or a failing battery management system.

3. How can I diagnose the underlying issue related to code P1BCF GMC?

- Proper diagnosis involves using a professional OBDII scanner to read the code, inspecting the hybrid/electric vehicle battery system, checking for loose connections, and testing the battery cells.

4. Are there any DIY repair tips for addressing code P1BCF GMC?

- DIY repair tips include checking and tightening battery connections, inspecting the wiring harness for damage, and ensuring proper battery cooling and ventilation.

5. Can I continue driving my vehicle with the OBDII code P1BCF GMC present?

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

6. How serious is OBDII code P1BCF GMC in a GMC hybrid or electric vehicle?

- This code should be taken seriously, as it indicates a performance issue within the hybrid/electric vehicle battery system that can impact vehicle operation and efficiency.

7. What are the potential long-term effects of ignoring code P1BCF GMC?

- Ignoring this code can lead to worsened fuel efficiency, reduced battery life, potential damage to other vehicle components, and ultimately, more costly repairs.

8. Is it necessary to visit a dealership or specialized mechanic to address OBDII code P1BCF GMC?

- While a dealership or specialized mechanic with experience in hybrid/electric vehicles is recommended, some basic inspection and repair tasks can be performed by DIY enthusiasts with the right tools and knowledge.

9. How can I prevent the recurrence of OBDII code P1BCF GMC in the future?

- Regular maintenance of the hybrid/electric vehicle battery system, timely repairs of any related issues, and following the manufacturer's recommended service schedule can help prevent the recurrence of this code.

10. Are there any recalls or service bulletins related to OBDII code P1BCF GMC in GMC vehicles?

- It's advisable to check with GMC dealerships or visit the manufacturer's website to stay updated on any recalls or service bulletins related to this specific OBDII code and its associated components.