AutoCodes – Cadillac – P1E65 Cadillac

P1E65 Cadillac Code - Hybrid/Electric Vehicle Battery 58 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: P1E65 Cadillac indicates Hybrid/Electric Vehicle Battery 58 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 830

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 P1E65 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 P1E65 Cadillac - Hybrid/Electric Vehicle Battery 58 Circuit - AutoCodes.com — P1E65 Cadillac Code - Hybrid/Electric Vehicle Battery 58 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E65 Cadillac?

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

How to Fix the DTC P1E65 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 P1E65 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 P1E65 Cadillac Code

1. What does the OBDII code P1E65 mean on a Cadillac?

The P1E65 code indicates an issue with the Hybrid/Electric Vehicle Battery 58 Circuit, suggesting a malfunction in the battery system or its related wiring and sensors.

2. What are the common symptoms of code P1E65 in a Cadillac?

Symptoms may include a check engine light, reduced fuel efficiency, limited hybrid or electric performance, or warnings about the hybrid system on the dashboard.

3. What causes the P1E65 code to appear in a Cadillac?

Potential causes include a faulty battery voltage sensor, damaged wiring or connectors in the battery circuit, a failing hybrid battery, or issues with the Battery Energy Control Module.

4. Can I drive my Cadillac with the P1E65 code active?

While the vehicle may still be drivable, itâ€™s not recommended as it could lead to reduced performance, further damage to the hybrid system, or safety concerns.

5. How do you diagnose the P1E65 code in a Cadillac?

Diagnosis involves using an advanced scan tool to read hybrid system data, inspecting the battery circuit wiring and connectors, and testing the voltage sensor and Battery Energy Control Module.

6. Is the P1E65 code specific to Cadillac vehicles?

Yes, the P1E65 code is specific to General Motors vehicles, including Cadillac, and relates to their hybrid and electric battery systems.

7. What repairs can fix the P1E65 code on a Cadillac?

Common repairs include replacing a faulty battery voltage sensor, repairing damaged wiring or connectors, reprogramming or replacing the Battery Energy Control Module, or servicing the hybrid battery.

8. How much does it cost to repair the P1E65 code on a Cadillac?

Repair costs can vary widely, ranging from $100 to $1,000 or more, depending on whether the issue is with wiring, sensors, or the hybrid battery itself.

9. Can a low-voltage 12V battery trigger the P1E65 code?

While unlikely, a weak or failing 12V battery can sometimes cause communication errors in the hybrid system, which might contribute to the P1E65 code.

10. Do I need to take my Cadillac to a dealership for the P1E65 code?

While independent shops with hybrid expertise can handle some repairs, the dealership may be better equipped to diagnose and resolve complex hybrid system issues.