AutoCodes – Generic – P1BCD

P1BCD 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 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 859

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

What does this mean?

What are the Possible Causes of the DTC P1BCD?

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

How to Fix the DTC P1BCD?

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 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.

Need more information about the P1BCD code?

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Need Help with the Code?

Get the P1BCD code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BCD Buick — Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage
P1BCD Cadillac — Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage
P1BCD Chevrolet — Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage
P1BCD GMC — Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage
P1BCD Saturn — Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage

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 Code

1. What are common symptoms of OBDII code P1BCD (Hybrid/Electric Vehicle Battery 78 Circuit Low Voltage)?

- Common symptoms include a decrease in fuel efficiency, hesitation or loss of power while driving, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P1BCD?

- Potential causes include a failing hybrid/electric vehicle battery, faulty battery management system, loose or corroded battery connections, or issues with the charging system.

3. How can I diagnose the OBDII code P1BCD related to low voltage in the hybrid/electric vehicle battery circuit?

- A thorough diagnostic scan using an OBDII scanner is the first step. Further testing may involve inspecting the battery connections, checking the battery voltage, and verifying the battery management system's functionality.

4. Can I drive my hybrid/electric vehicle with OBDII code P1BCD present?

- It is not recommended to drive the vehicle with this code present, as it could lead to further damage to the battery or electrical system. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1BCD?

- Start by checking and tightening all battery connections, inspecting for any signs of corrosion, and testing the battery voltage. If necessary, consult a professional technician for a thorough diagnosis and repair.

6. Is it safe to reset the OBDII code P1BCD without addressing the underlying issue?

- Resetting the code without fixing the root cause may temporarily turn off the check engine light, but the problem will likely resurface. It is important to address the underlying issue to prevent further complications.

7. How much does it typically cost to repair OBDII code P1BCD related to low voltage in the hybrid/electric vehicle battery circuit?

- The cost of repair can vary depending on the specific cause of the issue. It is advisable to consult a professional technician for an accurate diagnosis and cost estimate.

8. Can extreme weather conditions affect the occurrence of OBDII code P1BCD?

- Yes, extreme temperatures can impact the performance of hybrid/electric vehicle batteries, potentially leading to voltage-related issues. It is essential to monitor the battery's health and performance in varying weather conditions.

9. Are there any preventive measures to avoid OBDII code P1BCD in hybrid/electric vehicles?

- Regular maintenance and inspections of the battery system, keeping connections clean and secure, and monitoring the battery's voltage levels can help prevent issues that trigger this code.

10. How long can I safely drive my hybrid/electric vehicle with OBDII code P1BCD before getting it repaired?

- It is recommended to address the issue as soon as possible to prevent further damage. Continuing to drive with low voltage in the battery circuit can lead to more severe issues and potential safety risks.