AutoCodes – GMC – P1BBE GMC

P1BBE GMC Code - Hybrid/Electric Vehicle Battery 73 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: P1BBE GMC indicates Hybrid/Electric Vehicle Battery 73 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 920

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 P1BBE 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 P1BBE GMC - Hybrid/Electric Vehicle Battery 73 Circuit Low Voltage - AutoCodes.com — P1BBE GMC Code - Hybrid/Electric Vehicle Battery 73 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BBE GMC?

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

How to Fix the DTC P1BBE 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 P1BBE 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 P1BBE GMC Code

1. What are the common symptoms of OBDII code P1BBE in a GMC hybrid/electric vehicle?

- Common symptoms include reduced power, poor fuel efficiency, and potential issues with starting or charging the vehicle.

2. What is the typical cause of OBDII code P1BBE indicating Hybrid/Electric Vehicle Battery 73 Circuit Low Voltage in a GMC?

- This code is often triggered by a weak or failing battery, faulty battery management system, or issues with the battery circuit.

3. How can I diagnose the root cause of OBDII code P1BBE in my GMC hybrid/electric vehicle?

- Diagnostic steps may include testing the battery voltage levels, inspecting the battery connections, and scanning the vehicle's electrical system for faults.

4. Is it safe to continue driving my GMC with OBDII code P1BBE displayed?

- It is not recommended to continue driving as low voltage in the hybrid/electric battery system can lead to further damage and potential safety hazards.

5. What are some repair tips for resolving OBDII code P1BBE in a GMC hybrid/electric vehicle?

- Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring or connectors, and resetting the battery management system.

6. Can a DIY enthusiast fix OBDII code P1BBE on a GMC hybrid/electric vehicle?

- While some basic troubleshooting like checking connections can be done, diagnosing and repairing the root cause of the code may require specialized equipment and expertise.

7. How much does it typically cost to repair OBDII code P1BBE related to the Hybrid/Electric Vehicle Battery 73 Circuit Low Voltage issue in a GMC?

- Repair costs can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, especially if the battery needs replacement.

8. Are there any preventative measures to avoid OBDII code P1BBE in a GMC hybrid/electric vehicle?

- Regular maintenance of the hybrid/electric system, monitoring battery health, and addressing any warning signs promptly can help prevent the occurrence of this code.

9. Will resetting the OBDII code P1BBE clear the issue permanently in a GMC hybrid/electric vehicle?

- Resetting the code may temporarily clear the warning, but if the underlying issue is not addressed, the code is likely to reappear.

10. Should I seek professional help if I encounter OBDII code P1BBE in my GMC hybrid/electric vehicle?

- It is advisable to consult a certified mechanic or dealership specializing in hybrid/electric vehicles to accurately diagnose and repair the issue related to this code.