AutoCodes – Buick – P1EA5 Buick

P1EA5 Buick 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 Buick 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 1,037

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 Buick 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 Buick - Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit - AutoCodes.com — P1EA5 Buick 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 Buick?

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 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 P1EA5 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 P1EA5 Buick 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 in a Buick?

- Common symptoms include check engine light illumination, reduced hybrid/EV system performance, and potential issues with battery charging.

2. What could cause OBDII code P1EA5 to trigger in a Buick, indicating a problem with the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit?

- Possible causes include faulty wiring or connectors, a malfunctioning battery interface control module, or issues with the 4.5 V reference circuit.

3. How can you diagnose the underlying issue causing OBDII code P1EA5 in a Buick related to the Hybrid/EV Battery Interface Control Module?

- Diagnose the circuitry using a multimeter to check for continuity and voltage, inspect wiring for damage, and perform a thorough scan using a diagnostic tool for specific fault codes.

4. Are there any safety precautions to keep in mind when working on the Hybrid/EV Battery Interface Control Module 4 5 V Reference Circuit in a Buick?

- Ensure the vehicle is powered off, disconnect the battery before working on any electrical components, and handle high-voltage systems with caution to prevent electric shock.

5. What are some repair tips for addressing OBDII code P1EA5 in a Buick related to the Hybrid/EV Battery Interface Control Module issue?

- Start by inspecting and repairing any damaged wiring or connectors, reset the fault codes, and test the system to ensure proper functionality before clearing the codes.

6. Can resetting the OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module in a Buick temporarily resolve the issue?

- Resetting the code may temporarily clear the check engine light, but it will not fix the underlying problem causing the fault code to trigger.

7. Is it safe to continue driving a Buick with OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module issue?

- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage to the hybrid/EV system and potentially impact vehicle performance.

8. How critical is it to address OBDII code P1EA5 related to the Hybrid/EV Battery Interface Control Module in a Buick promptly?

- Promptly addressing this fault code is essential to prevent potential damage to the hybrid/EV system, ensure optimal vehicle performance, and avoid more costly repairs in the future.