AutoCodes – Cadillac – P1E02 Cadillac

P1E02 Cadillac 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 Cadillac 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 921

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 Cadillac 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 Cadillac - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage - AutoCodes.com — P1E02 Cadillac Code - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E02 Cadillac?

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

How to Fix the DTC P1E02 Cadillac?

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 Cadillac 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 Cadillac Code

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

- Common symptoms include reduced electric vehicle range, poor performance, and possible warning lights on the dashboard related to the hybrid/electric system.

2. What are the possible causes of OBDII code P1E02 in a Cadillac Hybrid/Electric Vehicle?

- Possible causes may include a failing hybrid/electric vehicle battery, issues with the battery management system, loose connections, or problems with the battery charging system.

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

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

4. Can I continue driving my Cadillac Hybrid/Electric Vehicle with OBDII code P1E02?

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

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

- Diagnosing and repairing this code typically requires advanced diagnostic tools and knowledge of hybrid/electric vehicle systems. It is recommended to take the vehicle to a qualified technician or dealership for proper diagnosis and repair.

6. Are there any DIY tips for addressing OBDII code P1E02 in a Cadillac Hybrid/Electric Vehicle?

- DIY repairs for this code are not recommended due to the complexity of hybrid/electric vehicle systems. It is best to seek professional help to ensure the issue is diagnosed and repaired correctly.

7. How much does it cost to fix OBDII code P1E02 in a Cadillac Hybrid/Electric Vehicle?

- The cost of fixing this code can vary depending on the root cause of the issue. It may involve battery repairs, software updates, or other components. It is advisable to get a diagnostic assessment to determine the exact cost.

8. Can a low voltage condition in the hybrid/electric vehicle battery be caused by extreme weather conditions?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery, leading to a low voltage condition. It is important to monitor the battery's health and take precautions in extreme weather.

9. Is it possible to prevent OBDII code P1E02 from occurring in a Cadillac Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric vehicle system, including checking the battery health and connections, can help prevent issues like low voltage conditions. Following manufacturer recommendations can also help prevent such codes.

10. How long does it take to repair OBDII code P1E02 in a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a technician for an estimated repair timeline.