AutoCodes – Cadillac – P1E01 Cadillac

P1E01 Cadillac Code - Hybrid/Electric Vehicle Battery 95 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: P1E01 Cadillac indicates Hybrid/Electric Vehicle Battery 95 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 1,157

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 P1E01 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 P1E01 Cadillac - Hybrid/Electric Vehicle Battery 95 Circuit Performance - AutoCodes.com — P1E01 Cadillac Code - Hybrid/Electric Vehicle Battery 95 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1E01 Cadillac?

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

How to Fix the DTC P1E01 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 P1E01 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 P1E01 Cadillac Code

1. What are common symptoms of OBDII code P1E01 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced battery performance, decreased fuel efficiency, and potential issues with starting the vehicle.

2. What could cause the P1E01 code to appear in a Cadillac Hybrid/Electric Vehicle?

- The code may be triggered by issues such as a faulty battery cell, damaged wiring, a malfunctioning battery temperature sensor, or a problem with the battery management system.

3. How can I diagnose the P1E01 code in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing the code may require using a scan tool to read the specific fault codes, conducting a visual inspection of the battery and related components, and testing the battery's voltage and temperature.

4. What are some repair tips for fixing the P1E01 code in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include replacing the damaged battery cell, repairing or replacing faulty wiring, calibrating the battery temperature sensor, or reprogramming the battery management system.

5. Is it safe to continue driving with the P1E01 code illuminated in a Cadillac Hybrid/Electric Vehicle?

- It is not recommended to continue driving with the code illuminated, as it could lead to further damage to the vehicle's battery system and potentially affect overall vehicle performance.

6. Can I reset the P1E01 code in my Cadillac Hybrid/Electric Vehicle using an OBDII scanner?

- Yes, you can reset the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reappearing.

7. How much does it typically cost to repair the P1E01 code in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the specific issue causing the code, but it may range from a few hundred to a few thousand dollars, especially if battery replacement is necessary.

8. Are there any preventive maintenance measures I can take to avoid the P1E01 code in my Cadillac Hybrid/Electric Vehicle?

- Regularly inspecting the battery system, maintaining proper charging habits, and following the manufacturer's recommended service schedule can help prevent issues that trigger the P1E01 code.

9. Will the P1E01 code affect the overall performance of my Cadillac Hybrid/Electric Vehicle?

- Yes, the code can impact the vehicle's performance by reducing battery efficiency, affecting fuel economy, and potentially leading to starting or drivability issues.

10. How long does it typically take to repair the P1E01 code in a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary depending on the complexity of the issue, but it may take several hours to a full day to diagnose and address the underlying cause of the code.