AutoCodes – Generic – P1BBB

P1BBB Code - Hybrid/Electric Vehicle Battery 72 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: P1BBB indicates Hybrid/Electric Vehicle Battery 72 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.

Save to My Repairs My Repairs

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

Code Popularity 2,273

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 P1BBB 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 P1BBB - Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage - AutoCodes.com — P1BBB Code - Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BBB?

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

How to Fix the DTC P1BBB?

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 P1BBB 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 P1BBB code?

Need more information on how to fix the P1BBB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BBB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BBB Buick — Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage
P1BBB Cadillac — Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage
P1BBB Chevrolet — Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage
P1BBB GMC — Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage
P1BBB Saturn — Hybrid/Electric Vehicle Battery 72 Circuit Low 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 P1BBB Code

1. What are the common symptoms of OBDII code P1BBB (Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage)?

- Common symptoms include the check engine light coming on, reduced hybrid/electric vehicle performance, and potential issues with starting or charging the vehicle.

2. What are the possible causes of OBDII code P1BBB?

- The code P1BBB can be caused by issues such as a faulty hybrid/electric vehicle battery, damaged wiring in the 72 circuit, or problems with the battery management system.

3. How can I diagnose the OBDII code P1BBB at home?

- You can use an OBDII scanner to retrieve the specific fault code P1BBB and further diagnose the issue by checking the battery voltage, inspecting the wiring in the 72 circuit, and examining the battery control module for any faults.

4. Is it safe to continue driving with OBDII code P1BBB present?

- It is not recommended to continue driving with the code P1BBB as it can lead to further damage to the hybrid/electric vehicle system and potentially leave you stranded if the battery voltage drops too low.

5. How can I reset the OBDII code P1BBB after making repairs?

- After addressing the underlying issue causing the code P1BBB, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the fault code.

6. Are there any DIY repair tips for fixing OBDII code P1BBB?

- DIY repair tips include checking and cleaning the battery terminals, inspecting the 72 circuit wiring for damage, and ensuring proper connections within the battery management system.

7. Can extreme weather conditions affect the occurrence of OBDII code P1BBB?

- Yes, extreme temperatures can impact the performance of hybrid/electric vehicle batteries, potentially leading to issues like low voltage in the 72 circuit and triggering the code P1BBB.

8. How much does it typically cost to repair OBDII code P1BBB at a professional auto repair shop?

- The cost of repairing OBDII code P1BBB can vary depending on the extent of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. What steps can I take to prevent OBDII code P1BBB from occurring in the future?

- To prevent the recurrence of code P1BBB, it's important to perform regular maintenance on the hybrid/electric vehicle battery, keep an eye on battery voltage levels, and address any warning signs promptly.

10. Is it possible to drive a hybrid/electric vehicle if the battery is diagnosed with low voltage related to code P1BBB?

- It is not recommended to drive a hybrid/electric vehicle with low battery voltage as it can lead to performance issues, potential damage to the vehicle's systems, and an increased risk of being stranded due to battery failure.