AutoCodes – Chevrolet – P1BAA Chevrolet

P1BAA Chevrolet Code - Hybrid/Electric Vehicle Battery 66 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: P1BAA Chevrolet indicates Hybrid/Electric Vehicle Battery 66 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 994

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 P1BAA 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 P1BAA Chevrolet - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage - AutoCodes.com — P1BAA Chevrolet Code - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BAA Chevrolet?

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

How to Fix the DTC P1BAA 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 P1BAA 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 P1BAA Chevrolet Code

1. What are the common symptoms of OBDII code P1BAA in a Chevrolet Hybrid/Electric Vehicle?

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

2. What can cause the OBDII code P1BAA to occur in a Chevrolet Hybrid/Electric Vehicle?

- The code P1BAA typically occurs due to a high voltage reading in the hybrid/electric vehicle battery 66 circuit, which can be caused by issues like battery cell defects or wiring faults.

3. How serious is the OBDII code P1BAA in a Chevrolet Hybrid/Electric Vehicle?

- The code P1BAA should be addressed promptly as it can affect the vehicle's performance and fuel efficiency, and ignoring it may lead to further damage to the hybrid/electric system.

4. What are some DIY repair tips for OBDII code P1BAA in a Chevrolet Hybrid/Electric Vehicle?

- DIY repair tips may include checking the battery connections, inspecting the wiring for any visible damage, and ensuring the battery cells are functioning properly. However, it is recommended to seek professional help for accurate diagnosis and repair.

5. Can driving with the OBDII code P1BAA in a Chevrolet Hybrid/Electric Vehicle cause further damage?

- Continuing to drive with the code P1BAA may cause further strain on the hybrid/electric system and lead to more severe issues over time, so it is advisable to address the problem promptly.

6. How much does it cost to repair OBDII code P1BAA in a Chevrolet Hybrid/Electric Vehicle?

- The cost of repairing the OBDII code P1BAA can vary depending on the specific underlying cause, but it may involve expenses for diagnostic testing, parts replacement, and labor costs.

7. Is it safe to drive a Chevrolet Hybrid/Electric Vehicle with the OBDII code P1BAA?

- Driving with the code P1BAA may be risky as it can impact the vehicle's performance and efficiency, so it is recommended to have the issue diagnosed and repaired before continuing to drive the vehicle.