AutoCodes – Generic – P1E84

P1E84 Code - Hybrid/Electric Vehicle Battery 89 Circuit

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: P1E84 indicates Hybrid/Electric Vehicle Battery 89 Circuit.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,043

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1E84 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 P1E84 - Hybrid/Electric Vehicle Battery 89 Circuit - AutoCodes.com — P1E84 Code - Hybrid/Electric Vehicle Battery 89 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E84?

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

How to Fix the DTC P1E84?

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 P1E84 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.

Need more information about the P1E84 code?

Need more information on how to fix the P1E84 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E84 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E84 Buick — Hybrid/Electric Vehicle Battery 89 Circuit
P1E84 Cadillac — Hybrid/Electric Vehicle Battery 89 Circuit
P1E84 Chevrolet — Hybrid/Electric Vehicle Battery 89 Circuit
P1E84 GMC — Hybrid/Electric Vehicle Battery 89 Circuit
P1E84 Saturn — Hybrid/Electric Vehicle Battery 89 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 P1E84 Code

1. What are the common symptoms of OBDII code P1E84 related to the Hybrid/Electric Vehicle Battery 89 Circuit?

- Common symptoms include decreased hybrid/electric vehicle performance, reduced fuel efficiency, and warning lights on the dashboard indicating a battery issue.

2. What are the possible causes of OBDII code P1E84 in relation to the Hybrid/Electric Vehicle Battery 89 Circuit?

- Possible causes include a faulty battery pack, issues with battery cell modules, damaged wiring or connectors, or problems with the battery management system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 89 Circuit issue associated with OBDII code P1E84?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble code, conducting a visual inspection of the battery components, and performing specific tests outlined in the manufacturer's service manual.

4. Can I continue driving my hybrid/electric vehicle with OBDII code P1E84 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the battery system and affect the vehicle's performance and safety.

5. What are some repair tips for addressing OBDII code P1E84 related to the Hybrid/Electric Vehicle Battery 89 Circuit?

- Repair tips may include checking and repairing damaged wiring, replacing faulty battery modules, resetting the battery management system, or seeking professional assistance from a qualified technician.

6. Is it possible to reset the OBDII code P1E84 without repairing the underlying issue?

- While clearing the code may temporarily turn off the warning light, it is essential to address the root cause of the problem to prevent further damage and ensure the vehicle operates safely.

7. How much does it typically cost to repair OBDII code P1E84 associated with the Hybrid/Electric Vehicle Battery 89 Circuit?

- The cost of repair can vary depending on the specific issue, the vehicle make and model, and whether the repair is performed by a dealership or an independent repair shop. It is advisable to obtain quotes from multiple sources.

8. Are there any preventive maintenance measures to avoid OBDII code P1E84 in hybrid/electric vehicles?

- Regularly inspecting the battery system, following the manufacturer's recommended maintenance schedule, and avoiding extreme temperature conditions can help prevent issues leading to OBDII code P1E84.

9. Can a DIY enthusiast attempt to repair OBDII code P1E84 related to the Hybrid/Electric Vehicle Battery 89 Circuit?

- While some basic troubleshooting and repairs may be possible for experienced DIY enthusiasts, dealing with high-voltage hybrid/electric vehicle systems can be dangerous, and it is often best left to professionals with the necessary training and equipment.

10. How long does it typically take to repair OBDII code P1E84 associated with the Hybrid/Electric Vehicle Battery 89 Circuit?

- The repair time can vary depending on the complexity of the issue, the availability of parts, and the technician's experience. Some repairs may be completed in a few hours, while others may require more extensive diagnostics and repairs over several days.