AutoCodes – GMC – P1B1C GMC

P1B1C GMC Code - Hybrid/Electric Vehicle Battery 29 Circuit Performance

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: P1B1C GMC indicates Hybrid/Electric Vehicle Battery 29 Circuit Performance.
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 1,054

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 08, 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 P1B1C 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 P1B1C GMC - Hybrid/Electric Vehicle Battery 29 Circuit Performance - AutoCodes.com — P1B1C GMC Code - Hybrid/Electric Vehicle Battery 29 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B1C GMC?

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

How to Fix the DTC P1B1C 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 P1B1C 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.

Need more information about the P1B1C GMC code?

Need more information on how to fix the P1B1C GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B1C GMC code diagnosed by a professional: Find a repair shop in your area

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 P1B1C GMC Code

1. What are common symptoms of OBDII code P1B1C GMC (Hybrid/Electric Vehicle Battery 29 Circuit Performance)?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P1B1C GMC?

- Possible causes include issues with the hybrid/electric vehicle battery, faulty battery control module, wiring problems, or a malfunctioning hybrid system component.

3. How can I diagnose OBDII code P1B1C GMC?

- Diagnosis typically involves using a professional OBDII scanner to read the code and then conducting further testing to pinpoint the exact cause, such as checking the battery voltage, inspecting wiring connections, and performing system checks.

4. What are some repair tips for addressing code P1B1C GMC?

- Repair tips may include checking and tightening battery connections, inspecting and repairing damaged wiring, resetting the battery control module, and ensuring all hybrid system components are functioning properly.

5. Can I drive my vehicle with OBDII code P1B1C GMC active?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the hybrid/electric system and potentially affect overall vehicle performance.

6. How serious is OBDII code P1B1C GMC?

- This code should be addressed promptly to prevent potential damage to the hybrid/electric system and ensure optimal vehicle performance and fuel efficiency.

7. Can a DIY enthusiast fix OBDII code P1B1C GMC?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the underlying cause of this code may require specialized knowledge and tools, so consulting a professional technician is recommended.

8. How much does it cost to repair OBDII code P1B1C GMC?

- Repair costs can vary depending on the specific cause of the code and any necessary parts or labor involved. It's best to consult a professional technician for an accurate diagnosis and cost estimate.

9. Can a low or failing hybrid/electric vehicle battery cause code P1B1C GMC?

- Yes, a low or failing hybrid/electric vehicle battery can contribute to the triggering of this code, as it may impact the performance and efficiency of the battery system.

10. Are there any recalls related to OBDII code P1B1C GMC?

- It's recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code for your vehicle.