AutoCodes – Generic – P1BC8

P1BC8 Code - Hybrid/Electric Vehicle Battery 76 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: P1BC8 indicates Hybrid/Electric Vehicle Battery 76 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 1,525

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 P1BC8 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 P1BC8 - Hybrid/Electric Vehicle Battery 76 Circuit High Voltage - AutoCodes.com — P1BC8 Code - Hybrid/Electric Vehicle Battery 76 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC8?

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

How to Fix the DTC P1BC8?

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 P1BC8 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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Need Help with the Code?

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Information for Specific Makes

P1BC8 Buick — Hybrid/Electric Vehicle Battery 76 Circuit High Voltage
P1BC8 Cadillac — Hybrid/Electric Vehicle Battery 76 Circuit High Voltage
P1BC8 Chevrolet — Hybrid/Electric Vehicle Battery 76 Circuit High Voltage
P1BC8 GMC — Hybrid/Electric Vehicle Battery 76 Circuit High Voltage
P1BC8 Saturn — Hybrid/Electric Vehicle Battery 76 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 P1BC8 Code

1. What are common symptoms of OBDII code P1BC8 (Hybrid/Electric Vehicle Battery 76 Circuit High Voltage)?

- Common symptoms include reduced hybrid system performance, illuminated warning lights on the dashboard, and possible overheating of the battery system.

2. What can cause OBDII code P1BC8 to trigger in a hybrid or electric vehicle?

- This code can be triggered by issues such as a malfunctioning high voltage battery circuit, faulty battery management system, or a problem with the battery pack itself.

3. How serious is OBDII code P1BC8 (Hybrid/Electric Vehicle Battery 76 Circuit High Voltage)?

- This code indicates a potentially serious issue with the high voltage circuit in the battery system of a hybrid or electric vehicle, which should be addressed promptly to prevent further damage or safety hazards.

4. Can OBDII code P1BC8 be safely driven with?

- It is not recommended to continue driving a vehicle with OBDII code P1BC8, as it may lead to further damage to the battery system or other components, and could pose a safety risk.

5. What are some possible repair options for OBDII code P1BC8?

- Repair options may include diagnosing and fixing the specific issue causing the high voltage circuit fault, resetting the fault code, or replacing faulty components in the battery system.

6. Is it safe to attempt DIY repairs for OBDII code P1BC8?

- Due to the high voltage nature of the components involved, DIY repairs for OBDII code P1BC8 are not recommended. It is best to have the issue diagnosed and repaired by a qualified technician.

7. How can I prevent OBDII code P1BC8 from occurring in the future?

- Regular maintenance and inspections of the high voltage battery system in hybrid or electric vehicles can help prevent issues that may trigger OBDII code P1BC8. Following manufacturer guidelines for battery care is also important.

8. Does OBDII code P1BC8 affect the fuel efficiency of a hybrid vehicle?

- Yes, OBDII code P1BC8 can impact the fuel efficiency of a hybrid vehicle by causing the hybrid system to operate inefficiently or by limiting the vehicle's electric driving range.

9. How long does it typically take to repair OBDII code P1BC8?

- The repair time for OBDII code P1BC8 can vary depending on the underlying cause and severity of the issue. It may range from a few hours to a day or more, especially if parts need to be ordered.

10. Can OBDII code P1BC8 be a recurring issue in hybrid or electric vehicles?

- OBDII code P1BC8 can be a recurring issue if the root cause is not properly addressed during repairs. It is important to ensure that the high voltage battery system is thoroughly checked and repaired to prevent the code from reoccurring.