AutoCodes – Cadillac – P1E87 Cadillac

P1E87 Cadillac Code - Hybrid/Electric Vehicle Battery 92 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: P1E87 Cadillac indicates Hybrid/Electric Vehicle Battery 92 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 1,064

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 P1E87 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 P1E87 Cadillac - Hybrid/Electric Vehicle Battery 92 Circuit - AutoCodes.com — P1E87 Cadillac Code - Hybrid/Electric Vehicle Battery 92 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E87 Cadillac?

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

How to Fix the DTC P1E87 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 P1E87 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 P1E87 Cadillac Code

1. What are common symptoms of OBDII code P1E87 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include decreased fuel efficiency, reduced power output, and potential issues with the vehicle's hybrid/electric battery system.

2. What causes OBDII code P1E87 in a Cadillac Hybrid/Electric Vehicle?

- This code is typically triggered by a fault in the Hybrid/Electric Vehicle Battery 92 Circuit, which could be due to wiring issues, a faulty battery component, or a communication error.

3. How can I diagnose OBDII code P1E87 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the battery connections and wiring, and potentially conducting a battery system test if needed.

4. Can I continue driving my Cadillac with OBDII code P1E87 present?

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

5. How can I reset OBDII code P1E87 in my Cadillac Hybrid/Electric Vehicle?

- Resetting the code can be done with an OBDII scanner by clearing the fault code after addressing the underlying issue with the Hybrid/Electric Vehicle Battery 92 Circuit.

6. Are there any DIY repair tips for OBDII code P1E87 in a Cadillac Hybrid/Electric Vehicle?

- DIY repair tips may include checking and tightening battery connections, inspecting the wiring for any visible damage, and ensuring the battery components are functioning properly.

7. Is it safe to drive a Cadillac Hybrid/Electric Vehicle with a faulty Hybrid/Electric Vehicle Battery 92 Circuit?

- It is not safe to drive with a faulty circuit, as it can impact the vehicle's hybrid/electric system and potentially lead to unexpected issues while driving.

8. How much does it cost to repair OBDII code P1E87 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repair can vary depending on the underlying cause of the code, but it may involve replacing damaged wiring, fixing faulty battery components, or addressing communication errors in the system.

9. Can OBDII code P1E87 in a Cadillac Hybrid/Electric Vehicle be intermittent?

- Yes, the code can be intermittent if the underlying issue with the Hybrid/Electric Vehicle Battery 92 Circuit is sporadic, making it important to address the problem promptly.

10. Does OBDII code P1E87 affect the overall performance of a Cadillac Hybrid/Electric Vehicle?

- Yes, this code can impact the vehicle's performance by affecting the hybrid/electric system, potentially leading to decreased efficiency and power output.