AutoCodes – Cadillac – P1E6B Cadillac

P1E6B Cadillac Code - Hybrid/Electric Vehicle Battery 64 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: P1E6B Cadillac indicates Hybrid/Electric Vehicle Battery 64 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 782

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 P1E6B 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 P1E6B Cadillac - Hybrid/Electric Vehicle Battery 64 Circuit - AutoCodes.com — P1E6B Cadillac Code - Hybrid/Electric Vehicle Battery 64 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E6B Cadillac?

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

How to Fix the DTC P1E6B 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 P1E6B 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 P1E6B Cadillac Code

1. What does the OBDII code P1E6B mean on a Cadillac?

P1E6B indicates an issue with the Hybrid/Electric Vehicle Battery 64 Circuit, often related to voltage or communication problems within the battery management system.

2. What are the common symptoms of code P1E6B in a Cadillac?

Symptoms may include a check engine light, reduced hybrid or electric performance, limited power mode, or difficulty charging the battery.

3. What causes the P1E6B code to appear?

Common causes include faulty battery sensors, damaged wiring or connectors in the battery circuit, a failing hybrid battery module, or software issues in the battery control module.

4. Can I drive my Cadillac with a P1E6B code?

Itâ€™s not recommended to drive with this code, as it may cause reduced performance or further damage to the hybrid system. Seek professional diagnosis immediately.

5. How is the P1E6B code diagnosed?

A technician will use a diagnostic scanner to retrieve freeze frame data, inspect the battery circuit wiring and connectors, and test the battery control module for faults.

6. What are some possible fixes for the P1E6B code?

Repairs could include replacing damaged wiring, repairing or replacing battery sensors, reprogramming the control module, or replacing the hybrid battery pack if necessary.

7. How much does it cost to fix a P1E6B code on a Cadillac?

Repair costs vary but can range from $100 for minor wiring repairs to several thousand dollars if the hybrid battery needs replacement.

8. Can a software update fix the P1E6B code?

In some cases, a software update to the battery control module can resolve the issue, particularly if the problem is related to programming errors.

9. Is the P1E6B code covered under warranty for Cadillac vehicles?

Hybrid battery and related components may be covered under the vehicleâ€™s hybrid system warranty, which is typically longer than the standard warranty. Check with your dealership for details.

10. What tools are needed to diagnose and repair the P1E6B code?

Diagnosis requires an OBDII scanner capable of reading hybrid system codes, a multimeter for checking circuits, and possibly specialized tools for hybrid battery servicing.