AutoCodes – Generic – P1E87

P1E87 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 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 934

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

What does this mean?

What are the Possible Causes of the DTC P1E87?

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

How to Fix the DTC P1E87?

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 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 P1E87 code?

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Need Help with the Code?

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Information for Specific Makes

P1E87 Buick — Hybrid/Electric Vehicle Battery 92 Circuit
P1E87 Cadillac — Hybrid/Electric Vehicle Battery 92 Circuit
P1E87 Chevrolet — Hybrid/Electric Vehicle Battery 92 Circuit
P1E87 GMC — Hybrid/Electric Vehicle Battery 92 Circuit
P1E87 Saturn — Hybrid/Electric Vehicle Battery 92 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 P1E87 Code

1. What does the OBDII code P1E87 mean?

P1E87 indicates an issue with the Hybrid/Electric Vehicle Battery 92 Circuit, typically involving the monitoring or communication of a specific battery module.

2. What are the common symptoms of code P1E87?

Symptoms may include the illumination of the check engine or hybrid system warning light, reduced fuel efficiency, diminished electric-only range, or the vehicle entering limp mode.

3. What causes the P1E87 code to appear?

The most common causes are faulty battery module connections, damaged wiring in the circuit, a malfunctioning battery module, or an issue with the battery energy control module.

4. Can I drive with the P1E87 code active?

Driving with the P1E87 code is not recommended, as it may cause further damage to the hybrid battery system or lead to reduced vehicle performance.

5. How is the P1E87 code diagnosed?

A technician will use a scan tool to retrieve the code, inspect the battery circuit wiring and connectors, and test the battery module and related control systems for faults.

6. What repairs are needed to fix the P1E87 code?

Repairs may include replacing or repairing damaged wiring or connectors, replacing a faulty battery module, or reprogramming the battery energy control module if necessary.

7. How much does it cost to repair the P1E87 code?

Repair costs vary, ranging from $100 to $1,000 or more, depending on whether wiring repairs or battery module replacements are needed.

8. Can a dead hybrid battery cause the P1E87 code?

While the code typically relates to a circuit issue, a failing or partially dead battery could trigger related circuit faults and should be inspected.

9. How can I prevent the P1E87 code from recurring?

Regular maintenance, inspecting battery connections for corrosion, and addressing warning lights promptly can help prevent this code from recurring.

10. Is the P1E87 code specific to a certain vehicle make or model?

The P1E87 code is most commonly associated with hybrid or electric vehicles but may vary in specifics depending on the manufacturer. Always consult vehicle-specific repair manuals.