AutoCodes – Generic – P1EA5

P1EA5 Code - Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit

Quick Answer

The drive motor battery contains 288 cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection. 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: P1EA5 indicates Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection.
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 1,144

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1EA5 Description

The drive motor battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the drive motor battery assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 volts, for a nominal system voltage of 355 volts 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 cell groups. Voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A serviceable voltage sense harness joins this connector to a drive motor battery high-voltage interface control module, also located on the top surface of the battery section. The drive motor battery high-voltage interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one drive motor battery high-voltage interface control module located on battery sections one and two, and two drive motor battery high-voltage interface control modules associated with battery section three. The drive motor battery high-voltage interface control module, voltage sense harnesses, battery control 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 P1EA5 - Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit - AutoCodes.com — P1EA5 Code - Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P1EA5?

Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P1EA5?

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 P1EA5 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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Information for Specific Makes

P1EA5 Buick — Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit
P1EA5 Cadillac — Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit
P1EA5 Chevrolet — Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit
P1EA5 GMC — Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit

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 P1EA5 Code

1. What are the common symptoms of OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- Common symptoms may include poor hybrid system performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What can cause the OBDII code P1EA5 to trigger in relation to the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- The code may be triggered by issues such as a malfunctioning battery interface control module, wiring faults, or a failing 4.5V reference circuit.

3. How can I diagnose the source of OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- Diagnosing the issue may involve using a scan tool to retrieve the specific trouble codes, testing the battery interface control module, and inspecting the wiring for any damage.

4. Are there any common repair tips for addressing OBDII code P1EA5 associated with the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- Repair tips may include checking and repairing any damaged wiring, replacing the battery interface control module if necessary, and ensuring proper connection of the 4.5V reference circuit.

5. Can OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit be fixed without professional help?

- While some basic troubleshooting steps can be taken, addressing this code may require specialized knowledge and tools, so seeking professional assistance is recommended.

6. What role does the Hybrid/EV Battery Interface Control Module play in the vehicle's operation?

- The Hybrid/EV Battery Interface Control Module manages communication between the hybrid or electric vehicle's battery system and other vehicle components to ensure proper performance and efficiency.

7. Is it safe to continue driving with OBDII code P1EA5 affecting the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- It is best to address the underlying issue causing the trouble code as soon as possible to prevent potential damage to the vehicle's hybrid system and ensure optimal performance.

8. How can I prevent OBDII code P1EA5 from recurring in the future after repairs have been made?

- Regular maintenance and inspections of the hybrid system, including the battery interface control module and related circuits, can help prevent the code from recurring in the future.

9. Are there any recalls or technical service bulletins related to OBDII code P1EA5 and the Hybrid/EV Battery Interface Control Module?

- Checking with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to this code can provide valuable information on known issues and solutions.

10. Can a faulty Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit impact other systems in the vehicle?

- Yes, a faulty module or circuit can potentially affect the performance of other systems in the vehicle, such as the hybrid powertrain, battery management, and overall drivability.