AutoCodes – Cadillac – P1E89 Cadillac

P1E89 Cadillac Code - Hybrid/Electric Vehicle Battery 94 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: P1E89 Cadillac indicates Hybrid/Electric Vehicle Battery 94 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 722

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 P1E89 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 P1E89 Cadillac - Hybrid/Electric Vehicle Battery 94 Circuit - AutoCodes.com — P1E89 Cadillac Code - Hybrid/Electric Vehicle Battery 94 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E89 Cadillac?

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

How to Fix the DTC P1E89 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 P1E89 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 P1E89 Cadillac Code

1. What are the common symptoms of OBDII code P1E89 in a Cadillac Hybrid/Electric Vehicle?

The common symptoms of code P1E89 may include reduced hybrid/electric vehicle performance, warning lights on the dashboard, and potential issues with battery charging.

2. What can cause the OBDII code P1E89 to appear in a Cadillac Hybrid/Electric Vehicle?

Code P1E89 usually indicates a fault in the Hybrid/Electric Vehicle Battery 94 Circuit, which can be caused by issues such as a malfunctioning battery cell, wiring problems, or electronic control module issues.

3. How can I diagnose the OBDII code P1E89 in my Cadillac Hybrid/Electric Vehicle?

Diagnosing code P1E89 typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the hybrid/electric vehicle battery system components, and testing the battery voltage and connections.

4. Is it safe to continue driving my Cadillac with OBDII code P1E89 present?

It is not recommended to continue driving your Cadillac with code P1E89 present, as it can lead to further damage to the hybrid/electric vehicle system and potentially cause safety concerns.

5. Can I repair the OBDII code P1E89 in my Cadillac Hybrid/Electric Vehicle myself?

Repairing code P1E89 may require advanced knowledge and tools related to hybrid/electric vehicle systems. It is recommended to seek assistance from a qualified technician or a dealership specializing in hybrid/electric vehicles.

6. How much does it typically cost to repair OBDII code P1E89 in a Cadillac Hybrid/Electric Vehicle?

The cost of repairing code P1E89 can vary depending on the underlying issue causing the fault. It is advisable to get a diagnostic assessment from a professional to determine the exact repair cost.

7. Are there any maintenance tips to prevent OBDII code P1E89 from recurring in my Cadillac Hybrid/Electric Vehicle?

Regularly maintaining your Cadillac's hybrid/electric vehicle system, including checking the battery health, keeping connections clean, and following manufacturer recommendations, can help prevent code P1E89 from recurring.

8. Will resetting the OBDII codes make OBDII code P1E89 disappear permanently?

Resetting the OBDII codes may temporarily clear code P1E89, but if the underlying issue causing the fault is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.

9. Can OBDII code P1E89 affect the fuel efficiency of my Cadillac Hybrid/Electric Vehicle?

Yes, code P1E89 can affect the fuel efficiency of your Cadillac Hybrid/Electric Vehicle as it relates to the performance of the hybrid/electric vehicle battery system, which plays a crucial role in overall efficiency.

10. How long does it take to repair OBDII code P1E89 in a Cadillac Hybrid/Electric Vehicle?

The repair time for code P1E89 can vary depending on the complexity of the issue and the availability of parts. It is recommended to consult with a professional technician for a more accurate estimate of the repair time.