AutoCodes – Buick – P1E02 Buick

P1E02 Buick Code - Hybrid/Electric Vehicle Battery 95 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: P1E02 Buick indicates Hybrid/Electric Vehicle Battery 95 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 842

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 Apr 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E02 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 P1E02 Buick - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage - AutoCodes.com — P1E02 Buick Code - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E02 Buick?

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

How to Fix the DTC P1E02 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 P1E02 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 P1E02 Buick Code

1. What are the common symptoms of OBDII code P1E02 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include decreased vehicle performance, reduced fuel efficiency, and potential issues with the hybrid/electric battery system.

2. What can cause the OBDII code P1E02 in a Buick Hybrid/Electric Vehicle?

- This code is often triggered by low voltage in the hybrid/electric vehicle battery system, which can be caused by a faulty battery, charging system issues, or wiring problems.

3. How serious is the OBDII code P1E02 in a Buick Hybrid/Electric Vehicle?

- This code indicates a low voltage condition in the hybrid/electric battery system, which can impact the vehicle's performance and efficiency. It is important to address this issue promptly to prevent further damage.

4. Can I continue driving my Buick with the OBDII code P1E02 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric battery system. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair the OBDII code P1E02 in my Buick Hybrid/Electric Vehicle?

- Diagnosing and repairing this code typically involves checking the hybrid/electric battery voltage, inspecting the battery connections, testing the charging system, and verifying the integrity of the wiring harness.

6. What are some DIY tips for addressing the OBDII code P1E02 in a Buick Hybrid/Electric Vehicle?

- DIY tips include checking the battery connections for corrosion or looseness, testing the battery voltage with a multimeter, inspecting the charging system components, and visually inspecting the wiring for any damage.

7. How much does it cost to repair the OBDII code P1E02 in a Buick Hybrid/Electric Vehicle?

- The cost of repairing this code can vary depending on the root cause of the issue. It may involve replacing the hybrid/electric battery, repairing wiring, or addressing charging system problems. Professional diagnostic fees and parts costs should be considered.

8. Can a low hybrid/electric battery voltage affect other systems in the vehicle?

- Yes, a low voltage condition in the hybrid/electric battery system can impact other vehicle systems, such as the engine performance, regenerative braking, and overall electrical functions.

9. Are there any recalls or technical service bulletins related to the OBDII code P1E02 in Buick Hybrid/Electric Vehicles?

- It is recommended to check with Buick dealerships or online resources for any recalls or technical service bulletins related to this specific OBDII code in Buick Hybrid/Electric Vehicles.

10. What should I do if I reset the OBDII code P1E02 and it comes back?

- If you reset the code and it comes back, it indicates that the underlying issue has not been properly addressed. It is important to perform a thorough diagnosis to determine the exact cause and proceed with the necessary repairs.