AutoCodes – GMC – P1E84 GMC

P1E84 GMC 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 GMC 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.

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Code Popularity 890

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

What does this mean?

What are the Possible Causes of the DTC P1E84 GMC?

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

How to Fix the DTC P1E84 GMC?

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 GMC 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 P1E84 GMC Code

1. What are the common symptoms of OBDII code P1E84 in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid/electric vehicle battery performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

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

- The code P1E84 is typically triggered by issues with the high voltage circuit within the hybrid/electric vehicle battery, such as a faulty battery cell or a problem with the battery management system.

3. How can I diagnose the OBDII code P1E84 in my GMC Hybrid/Electric Vehicle?

- Diagnosis often involves using a scan tool to read the specific diagnostic trouble code, checking the high voltage battery for any visible damage, and conducting electrical tests to pinpoint the exact issue.

4. Can I drive my GMC Hybrid/Electric Vehicle with an active P1E84 fault code?

- It is not recommended to drive the vehicle with an active P1E84 fault code, as it can lead to further damage to the hybrid/electric vehicle battery and potentially compromise vehicle safety.

5. What repairs are typically needed to fix OBDII code P1E84 in a GMC Hybrid/Electric Vehicle?

- Repairing the P1E84 code often involves addressing the underlying issue with the high voltage battery system, which may require replacing a faulty battery cell, repairing wiring connections, or reprogramming the battery management system.

6. Can a DIY enthusiast fix the OBDII code P1E84 in a GMC Hybrid/Electric Vehicle?

- Due to the complexity and high voltage nature of hybrid/electric vehicle systems, it is recommended to have the P1E84 code diagnosed and repaired by a qualified technician with experience working on these vehicles.

7. How much does it typically cost to repair OBDII code P1E84 in a GMC Hybrid/Electric Vehicle?

- The cost of repairing the P1E84 fault code can vary depending on the specific issue with the high voltage battery system, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Will resetting the OBDII code P1E84 in my GMC Hybrid/Electric Vehicle make it go away permanently?

- Resetting the fault code without addressing the underlying issue will not make it go away permanently. The code is likely to return until the root cause of the problem is fixed.

9. Are there any preventative maintenance tips to help avoid OBDII code P1E84 in a GMC Hybrid/Electric Vehicle?

- Regularly inspecting the high voltage battery system, following the manufacturer's recommended maintenance schedule, and avoiding overcharging or deep discharging the battery can help prevent issues that lead to the P1E84 fault code.

10. Can OBDII code P1E84 in a GMC Hybrid/Electric Vehicle be related to other hybrid/electric vehicle components?

- While the P1E84 code specifically relates to the hybrid/electric vehicle battery circuit, it is possible for issues with other components, such as the hybrid system control module or charging system, to indirectly contribute to triggering the fault code.