AutoCodes – GMC – P1BAA GMC

P1BAA GMC 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 GMC 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 928

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

What does this mean?

What are the Possible Causes of the DTC P1BAA GMC?

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

How to Fix the DTC P1BAA 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 P1BAA 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 P1BAA GMC Code

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

- Common symptoms include the Check Engine light illuminating, reduced hybrid system performance, and potential loss of power.

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

- The code P1BAA can be triggered due to issues such as high voltage in the hybrid/electric vehicle battery 66 circuit, faulty battery components, or wiring problems.

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

- The code P1BAA should be addressed promptly as it can affect the performance and safety of the hybrid/electric vehicle. It is recommended to diagnose and repair the issue as soon as possible.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with the OBDII code P1BAA present?

- It is not recommended to continue driving the vehicle with the code P1BAA present, as it may lead to further damage to the hybrid/electric vehicle system. It is best to have the issue diagnosed and repaired by a qualified technician.

5. How can I diagnose and repair the OBDII code P1BAA in my GMC Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to read the code and determine the specific issue causing the high voltage in the battery 66 circuit. Repair may involve checking the battery components, inspecting wiring for damage, and addressing any other related issues.

6. Is it possible to reset the OBDII code P1BAA in a GMC Hybrid/Electric Vehicle?

- While you can clear the code temporarily using a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring. Clearing the code without fixing the problem may lead to further complications.

7. Can a DIY enthusiast repair the OBDII code P1BAA in a GMC Hybrid/Electric Vehicle?

- Due to the complex nature of hybrid/electric vehicle systems and the potential safety risks involved, it is recommended to have the code P1BAA diagnosed and repaired by a qualified technician with experience working on such vehicles.

8. How much does it typically cost to repair the OBDII code P1BAA in a GMC Hybrid/Electric Vehicle?

- The cost of repairing the code P1BAA can vary depending on the specific underlying issue causing the high voltage in the battery 66 circuit. Costs may include parts, labor, and diagnostic fees, so it is best to consult with a technician for an accurate estimate.

9. Are there any preventive maintenance tips to avoid the OBDII code P1BAA in a GMC Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric vehicle system, including checking the battery components and wiring, can help prevent issues that may trigger the code P1BAA. Following the manufacturer's recommended maintenance schedule is key to keeping the vehicle in optimal condition.

10. Can the OBDII code P1BAA in a GMC Hybrid/Electric Vehicle be a recurring issue?

- If the underlying cause of the code P1BAA is not properly diagnosed and repaired, it can become a recurring issue. It is crucial to address the root cause of the high voltage in the battery 66 circuit to prevent the code from reappearing.