AutoCodes – Cadillac – P1E85 Cadillac

P1E85 Cadillac Code - Hybrid/Electric Vehicle Battery 90 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: P1E85 Cadillac indicates Hybrid/Electric Vehicle Battery 90 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 847

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 P1E85 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 P1E85 Cadillac - Hybrid/Electric Vehicle Battery 90 Circuit - AutoCodes.com — P1E85 Cadillac Code - Hybrid/Electric Vehicle Battery 90 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E85 Cadillac?

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

How to Fix the DTC P1E85 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 P1E85 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 P1E85 Cadillac Code

1. What are the common symptoms of OBDII code P1E85 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential illumination of the Check Engine Light.

2. What are the possible causes of the OBDII code P1E85 in a Cadillac Hybrid/Electric Vehicle?

- The code P1E85 typically indicates a fault in the Hybrid/Electric Vehicle Battery 90 circuit, which can be caused by issues such as wiring problems, battery pack failures, or electronic control module malfunctions.

3. How serious is the OBDII code P1E85 in a Cadillac Hybrid/Electric Vehicle?

- The code P1E85 should be addressed promptly as it can affect the overall performance and efficiency of the hybrid system. Ignoring the issue may lead to further damage and potentially impact the vehicle's drivability.

4. Can I continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P1E85 present?

- It is not recommended to continue driving the vehicle with the code P1E85 present, as it can result in decreased performance and potential long-term damage to the hybrid system components.

5. How can I diagnose and repair the OBDII code P1E85 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing and repairing the code P1E85 typically requires advanced diagnostic tools and knowledge of hybrid/electric vehicle systems. It is recommended to seek assistance from a qualified technician or dealership specializing in hybrid vehicle repairs.

6. Are there any DIY tips for troubleshooting the OBDII code P1E85 in a Cadillac Hybrid/Electric Vehicle?

- DIY troubleshooting for the code P1E85 is not recommended due to the complexity of hybrid/electric vehicle systems. It is best to consult a professional technician for accurate diagnosis and repair.

7. How much does it cost to repair the OBDII code P1E85 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairing the code P1E85 can vary depending on the underlying cause of the issue. It is advisable to obtain a diagnosis from a qualified technician to determine the exact repair cost.

8. Can a faulty Hybrid/Electric Vehicle Battery 90 circuit cause other issues in a Cadillac Hybrid/Electric Vehicle?

- Yes, a faulty Hybrid/Electric Vehicle Battery 90 circuit can cause a range of issues beyond the code P1E85, including drivability problems, decreased fuel efficiency, and potential damage to other hybrid system components.

9. Is the OBDII code P1E85 specific to Cadillac Hybrid/Electric Vehicles, or can it occur in other vehicle makes and models?

- The OBDII code P1E85 related to the Hybrid/Electric Vehicle Battery 90 circuit is specific to Cadillac Hybrid/Electric Vehicles, as it pertains to the manufacturer's unique hybrid system components and diagnostics.

10. How often should I have the hybrid system checked in my Cadillac Hybrid/Electric Vehicle to prevent issues like the OBDII code P1E85?

- It is recommended to follow the manufacturer's maintenance schedule for hybrid system inspections and service to prevent issues like the OBDII code P1E85. Regular maintenance can help identify potential problems early and ensure optimal performance of the hybrid system.