AutoCodes – Generic – P1BC5

P1BC5 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 908

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P1BC5?

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

How to Fix the DTC P1BC5?

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 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 P1BC5 code?

Need more information on how to fix the P1BC5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BC5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BC5 Buick — Hybrid/Electric Vehicle Battery 75 Circuit High Voltage
P1BC5 Cadillac — Hybrid/Electric Vehicle Battery 75 Circuit High Voltage
P1BC5 Chevrolet — Hybrid/Electric Vehicle Battery 75 Circuit High Voltage
P1BC5 GMC — Hybrid/Electric Vehicle Battery 75 Circuit High Voltage
P1BC5 Saturn — Hybrid/Electric Vehicle Battery 75 Circuit High 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 P1BC5 Code

1. What are the common symptoms of OBDII code P1BC5 (Hybrid/Electric Vehicle Battery 75 Circuit High Voltage)?

- Common symptoms may include the illumination of the check engine light, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What can cause OBDII code P1BC5 to trigger?

- This code is typically triggered by a high voltage circuit malfunction within the hybrid/electric vehicle battery system, which could be caused by wiring faults, sensor issues, or internal battery problems.

3. How serious is OBDII code P1BC5 (Hybrid/Electric Vehicle Battery 75 Circuit High Voltage)?

- This code should be addressed promptly as it relates to the high voltage system of the vehicle, which is crucial for the operation of hybrid/electric vehicles. Ignoring it could lead to further damage or safety concerns.

4. Can I continue driving my vehicle with OBDII code P1BC5 present?

- It is not recommended to continue driving the vehicle with this code present, as it could affect the performance and safety of the high voltage battery system. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P1BC5 at home?

- Diagnosing this code typically requires specialized tools and knowledge of hybrid/electric vehicle systems. It's recommended to consult a professional technician or specialized hybrid/electric vehicle repair shop for an accurate diagnosis.

6. What are some repair tips for addressing OBDII code P1BC5?

- Repairing this code may involve inspecting and repairing the high voltage circuit, checking the battery connections, testing sensors, and potentially replacing faulty components. It's best to follow manufacturer-specific repair procedures.

7. Is it safe to attempt DIY repairs for OBDII code P1BC5?

- Due to the high voltage nature of the system related to this code, DIY repairs are not recommended unless you have the necessary knowledge, tools, and safety precautions for working on hybrid/electric vehicle systems. Professional assistance is advised.

8. How much does it cost to repair OBDII code P1BC5?

- The cost of repairing this code can vary depending on the root cause of the issue, the extent of the repair needed, and labor rates. It's best to obtain estimates from qualified technicians or repair facilities.

9. Can clearing the OBDII code P1BC5 make it go away permanently?

- Clearing the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, the code is likely to reappear. It's important to diagnose and repair the root cause of the code.

10. How often does OBDII code P1BC5 occur in hybrid/electric vehicles?

- While the occurrence of this specific code may vary, issues related to the high voltage battery system in hybrid/electric vehicles can happen, highlighting the importance of regular maintenance and prompt repairs.