AutoCodes – Buick – P1BAE Buick

P1BAE Buick Code - Hybrid/Electric Vehicle Battery 68 Circuit Performance

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: P1BAE Buick indicates Hybrid/Electric Vehicle Battery 68 Circuit Performance.
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 950

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 P1BAE Buick 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 P1BAE Buick - Hybrid/Electric Vehicle Battery 68 Circuit Performance - AutoCodes.com — P1BAE Buick Code - Hybrid/Electric Vehicle Battery 68 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BAE Buick?

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

How to Fix the DTC P1BAE Buick?

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 P1BAE Buick 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 P1BAE Buick Code

1. What does the OBDII code P1BAE mean on a Buick?

P1BAE indicates a performance issue in the Hybrid/Electric Vehicle Battery 68 Circuit, often related to the high-voltage battery or its associated wiring and connections.

2. What are the symptoms of code P1BAE on a Buick?

Common symptoms include a check engine light, reduced hybrid system performance, poor fuel economy, or limited electric drive functionality.

3. What causes the P1BAE code on a Buick?

This code can be triggered by a faulty high-voltage battery cell, corroded or damaged wiring, loose connections, or a malfunctioning battery control module.

4. Is it safe to drive a Buick with the P1BAE code?

While the vehicle may still be drivable, continued operation with this code can lead to further damage to the hybrid system or reduced efficiency. Itâ€™s best to address the issue promptly.

5. How can I fix the P1BAE code on my Buick?

Repairs may include inspecting and repairing wiring or connectors, replacing defective battery cells, or reprogramming or replacing the battery control module.

6. Can a dead 12-volt battery cause the P1BAE code to appear?

While the 12-volt battery is separate from the high-voltage system, a weak or dead 12-volt battery can sometimes contribute to diagnostic errors, so testing it may be worthwhile.

7. How much does it cost to repair the P1BAE code on a Buick?

Repair costs vary depending on the root cause, ranging from $100 for minor wiring repairs to over $1,000 if the high-voltage battery or control module needs replacement.

8. Can a software update resolve the P1BAE code?

In some cases, a software update for the hybrid system or battery control module may resolve the issue, but it depends on the specific circumstances.

9. How do I diagnose the P1BAE code on my Buick?

Start by using an OBDII scanner to confirm the code, then inspect the high-voltage battery, wiring, and connectors for damage or corrosion. Professional diagnostic tools may be required for a deeper analysis.

10. Will resetting the check engine light fix the P1BAE code?

Resetting the light may temporarily clear the code, but if the underlying issue isnâ€™t addressed, the code is likely to reappear.