AutoCodes – Cadillac – P1E5E Cadillac

P1E5E Cadillac Code - Hybrid/Electric Vehicle Battery 51 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: P1E5E Cadillac indicates Hybrid/Electric Vehicle Battery 51 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 928

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 Mar 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E5E 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 P1E5E Cadillac - Hybrid/Electric Vehicle Battery 51 Circuit - AutoCodes.com — P1E5E Cadillac Code - Hybrid/Electric Vehicle Battery 51 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E5E Cadillac?

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

How to Fix the DTC P1E5E 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 P1E5E 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 P1E5E Cadillac Code

1. What does the OBDII code P1E5E mean on a Cadillac?

P1E5E indicates an issue with the Hybrid/Electric Vehicle Battery 51 Circuit, often related to a communication or performance problem within the battery control module.

2. What are the common symptoms of code P1E5E in a Cadillac?

Common symptoms include a check engine light, reduced hybrid or electric performance, limited power mode activation, or warning messages on the dashboard.

3. What causes the P1E5E code to appear?

Possible causes include a faulty battery control module, damaged wiring or connectors in the battery circuit, or an internal failure in the hybrid battery pack.

4. Is the P1E5E code specific to Cadillac vehicles?

While P1E5E is most commonly associated with Cadillac hybrid or electric vehicles, similar codes may appear in other GM hybrid models.

5. Can I drive my Cadillac with the P1E5E code active?

Driving with this code is not recommended, as it may lead to reduced performance, potential safety issues, or further damage to the hybrid battery system.

6. How is the P1E5E code diagnosed?

A technician will use a scan tool to check for additional codes, inspect the battery control module, test the circuit wiring, and perform voltage and resistance checks on the hybrid battery system.

7. What repairs might fix the P1E5E code?

Repairs may include replacing a damaged wiring harness, repairing or replacing the battery control module, or, in severe cases, servicing or replacing the hybrid battery pack.

8. How much does it cost to fix the P1E5E code on a Cadillac?

The cost can vary widely depending on the issue, ranging from $100â€“$300 for wiring repairs to over $1,000 for battery module replacement or hybrid battery repairs.

9. Can a dead 12V battery cause the P1E5E code?

A weak or dead 12V battery can sometimes trigger hybrid system faults, so itâ€™s worth checking the 12V battery before diagnosing more complex issues.

10. How can I prevent the P1E5E code from occurring?

Regular maintenance of the hybrid system, keeping connectors clean and secure, and addressing warning lights promptly can help prevent this code from appearing.