AutoCodes – GMC – P1BC2 GMC

P1BC2 GMC Code - Hybrid/Electric Vehicle Battery 74 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: P1BC2 GMC indicates Hybrid/Electric Vehicle Battery 74 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 885

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 P1BC2 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 P1BC2 GMC - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage - AutoCodes.com — P1BC2 GMC Code - Hybrid/Electric Vehicle Battery 74 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC2 GMC?

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

How to Fix the DTC P1BC2 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 P1BC2 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 P1BC2 GMC Code

1. What are the common symptoms of OBDII code P1BC2 GMC related to the Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Common symptoms include loss of power, poor fuel economy, and the vehicle going into a reduced power mode.

2. What are the possible causes of OBDII code P1BC2 GMC indicating Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Possible causes include a faulty high voltage battery pack, issues with the battery management system, or a problem with the high voltage wiring.

3. How can I diagnose the OBDII code P1BC2 GMC for the Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Diagnosis typically involves using a diagnostic scanner to read the code and performing a thorough inspection of the high voltage battery system and related components.

4. Can I still drive my vehicle with OBDII code P1BC2 GMC triggered for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- It is not recommended to drive the vehicle with this code present as it can lead to further damage and safety concerns related to the high voltage system.

5. How can I repair OBDII code P1BC2 GMC for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Repair may involve replacing the high voltage battery pack, addressing issues with the battery management system, or repairing any damaged high voltage wiring.

6. Is it safe to attempt DIY repairs for OBDII code P1BC2 GMC indicating Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Due to the high voltage nature of the system, it is recommended to seek professional help for repairs related to this code to ensure safety and proper diagnosis.

7. How much does it typically cost to repair OBDII code P1BC2 GMC for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- The cost of repair can vary depending on the specific issue, but it may involve significant expenses due to the complexity of the high voltage system in hybrid/electric vehicles.

8. Are there any preventive maintenance tips to avoid triggering OBDII code P1BC2 GMC for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage?

- Regularly servicing the high voltage battery system, monitoring battery health, and addressing any warning signs promptly can help prevent issues leading to this code.

9. Will resetting the OBDII code P1BC2 GMC for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently, as the problem causing the code will likely persist.

10. Can OBDII code P1BC2 GMC for Hybrid/Electric Vehicle Battery 74 Circuit High Voltage cause damage to other vehicle components if left unresolved?

- Yes, leaving this code unresolved can potentially lead to further damage to other high voltage components and compromise the safety and performance of the vehicle.