AutoCodes – Cadillac – P1E6E Cadillac

P1E6E Cadillac Code - Hybrid/Electric Vehicle Battery 67 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: P1E6E Cadillac indicates Hybrid/Electric Vehicle Battery 67 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 785

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 P1E6E 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 P1E6E Cadillac - Hybrid/Electric Vehicle Battery 67 Circuit - AutoCodes.com — P1E6E Cadillac Code - Hybrid/Electric Vehicle Battery 67 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E6E Cadillac?

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

How to Fix the DTC P1E6E 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 P1E6E 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 P1E6E Cadillac Code

1. What does the OBDII code P1E6E mean on a Cadillac?

The P1E6E code indicates an issue with the Hybrid/Electric Vehicle Battery 67 Circuit, which typically relates to a fault in the high-voltage battery system or associated circuitry.

2. What are the common symptoms of the P1E6E code on a Cadillac?

Symptoms may include a check engine light, reduced vehicle performance, limited hybrid or electric mode functionality, and warning messages on the dashboard.

3. What causes the P1E6E code to appear?

Common causes include damaged wiring or connectors in the battery circuit, a faulty battery control module, or internal issues within the high-voltage battery itself.

4. Is the P1E6E code safe to drive with?

It is not recommended to drive with this code, as it may lead to further damage or reduced vehicle performance, particularly in hybrid or electric modes.

5. How is the P1E6E code diagnosed?

A technician will use a scan tool to retrieve the code, inspect the battery circuit wiring and connections, and test the battery control module and high-voltage battery for faults.

6. Can the P1E6E code be fixed without replacing the battery?

Yes, if the issue is limited to damaged wiring, connectors, or a faulty control module, these components can often be repaired or replaced without replacing the entire battery.

7. How much does it cost to repair the P1E6E code on a Cadillac?

Repair costs vary depending on the cause, ranging from $100-$300 for wiring repairs to over $1,000 if the battery or control module requires replacement.

8. Can a weak 12-volt battery cause the P1E6E code?

While unlikely, a weak 12-volt battery can sometimes cause communication issues or false errors in the hybrid system. Testing and replacing the 12-volt battery may resolve the issue in rare cases.

9. What tools are needed to troubleshoot the P1E6E code?

A professional-grade scan tool capable of reading hybrid/EV-specific codes, a multimeter for testing wiring, and manufacturer-specific diagnostic procedures are typically required.

10. Does the P1E6E code require dealership service?

Not necessarily, but hybrid/electric vehicle systems are complex, so it may be best to have the issue diagnosed and repaired by a certified technician with hybrid/EV experience.