AutoCodes – Chevrolet – P1BB2 Chevrolet

P1BB2 Chevrolet Code - Hybrid/Electric Vehicle Battery 69 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: P1BB2 Chevrolet indicates Hybrid/Electric Vehicle Battery 69 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 1,051

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 P1BB2 Chevrolet 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 P1BB2 Chevrolet - Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage - AutoCodes.com — P1BB2 Chevrolet Code - Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB2 Chevrolet?

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

How to Fix the DTC P1BB2 Chevrolet?

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 P1BB2 Chevrolet 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 P1BB2 Chevrolet Code

1. What are the common symptoms of OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle?

- Common symptoms include a check engine light illumination, reduced vehicle performance, and potential issues with the hybrid/electric battery.

2. What are the possible causes of OBDII code P1BB2 indicating Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage in a Chevrolet?

- The code P1BB2 can be triggered by issues such as a faulty battery cell, damaged wiring, a failing battery management system, or poor battery connections.

3. How can I diagnose the OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle?

- Diagnosis involves using a scan tool to retrieve the code, inspecting the hybrid/electric battery components, checking for loose connections, and testing the battery voltage.

4. Can driving with OBDII code P1BB2 present cause further damage to my Chevrolet Hybrid/Electric Vehicle?

- Continuing to drive with the code P1BB2 can potentially lead to complete battery failure, reduced fuel efficiency, and other electrical system issues.

5. What are some repair tips for resolving OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle?

- Repair tips include checking and tightening battery connections, replacing damaged wiring, testing and potentially replacing faulty battery cells, and resetting the trouble code.

6. Is it safe to attempt DIY repairs for OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle?

- While some basic checks and repairs like tightening connections can be done by DIY enthusiasts, complex battery diagnostics and repairs should be left to professionals due to the high voltage nature of hybrid/electric systems.

7. How much does it typically cost to repair OBDII code P1BB2 related issues in a Chevrolet Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the specific issue, but it may range from a few hundred to a couple of thousand dollars, especially if battery components need to be replaced.

8. Can resetting the OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle resolve the issue temporarily?

- Resetting the code may temporarily turn off the check engine light, but the underlying issue causing the code will persist and may lead to further problems if not properly addressed.

9. Are there any preventive maintenance steps to avoid OBDII code P1BB2 in a Chevrolet Hybrid/Electric Vehicle?

- Regularly inspecting the battery connections, monitoring battery health, following manufacturer maintenance schedules, and avoiding overcharging can help prevent issues that trigger the P1BB2 code.

10. How long can I safely drive my Chevrolet Hybrid/Electric Vehicle with OBDII code P1BB2 before getting it repaired?

- It is recommended to address the issue promptly to prevent further damage. Continuing to drive with the code present can lead to more severe problems and potentially leave you stranded.