AutoCodes – GMC – P1BCD GMC

P1BCD GMC Code - Hybrid/Electric Vehicle Battery 78 Circuit Low 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: P1BCD GMC indicates Hybrid/Electric Vehicle Battery 78 Circuit Low 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 P1BCD 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 P1BCD GMC - Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage - AutoCodes.com — P1BCD GMC Code - Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BCD GMC?

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

How to Fix the DTC P1BCD 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 P1BCD 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 P1BCD GMC Code

1. What are the common symptoms of OBDII code P1BCD GMC related to the Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- Symptoms may include reduced hybrid system performance, poor fuel economy, difficulty starting the vehicle, and the illumination of the hybrid system warning light.

2. What are the possible causes of OBDII code P1BCD GMC indicating Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- The code may be triggered by issues such as a faulty battery cell, damaged battery wiring, poor battery connections, or problems with the battery management system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage code P1BCD in my GMC vehicle?

- Diagnosing the issue may involve using a diagnostic scanner to read the code, checking the battery voltage levels, inspecting the battery connections, and performing a battery load test.

4. Can I still drive my GMC vehicle with the P1BCD code indicating Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- It is not recommended to drive the vehicle with this code present, as it may lead to further damage to the hybrid system components and potential safety hazards.

5. What are some repair tips for addressing the OBDII code P1BCD GMC related to the Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- Repair tips may include checking and cleaning battery terminals, replacing damaged battery cells, repairing faulty wiring, and resetting the hybrid system codes after repairs are completed.

6. Is it safe to attempt DIY repairs for the P1BCD code indicating Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage in my GMC vehicle?

- While some basic checks and repairs like inspecting connections can be done by DIY enthusiasts, complex repairs involving the high-voltage hybrid system should be left to trained professionals.

7. How can I prevent the recurrence of the OBDII code P1BCD GMC for Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- Regular maintenance of the hybrid system, including checking the battery health, keeping connections clean and tight, and addressing any warning lights promptly, can help prevent the code from reappearing.

8. Will resetting the OBDII code P1BCD GMC related to Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage solve the underlying issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the root cause of the low voltage issue in the hybrid/electric vehicle battery system.

9. What are the potential risks of ignoring the OBDII code P1BCD GMC for Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage?

- Ignoring the code can lead to further deterioration of the hybrid battery system, reduced vehicle performance, increased fuel consumption, and potential failure of the hybrid system components.

10. How long does it typically take to repair the Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage issue indicated by OBDII code P1BCD GMC?

- The repair time can vary depending on the exact cause of the low voltage issue, but it may take anywhere from a few hours to a day or more, especially if complex repairs or component replacements are needed.