AutoCodes – Buick – P1E6F Buick

P1E6F Buick Code - Hybrid/Electric Vehicle Battery 68 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: P1E6F Buick indicates Hybrid/Electric Vehicle Battery 68 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 710

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 P1E6F Buick 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 P1E6F Buick - Hybrid/Electric Vehicle Battery 68 Circuit - AutoCodes.com — P1E6F Buick Code - Hybrid/Electric Vehicle Battery 68 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E6F Buick?

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

How to Fix the DTC P1E6F Buick?

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 P1E6F Buick 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 P1E6F Buick Code

1. What does the OBDII code P1E6F mean on a Buick?

Code P1E6F indicates an issue with the Hybrid/Electric Vehicle Battery 68 Circuit, which is related to the monitoring or communication of a specific battery cell or circuit in the hybrid/electric system.

2. What are the common symptoms of code P1E6F in a Buick?

Symptoms may include the check engine light or hybrid system warning light turning on, reduced hybrid or electric performance, and decreased fuel efficiency.

3. What causes the P1E6F code to appear in a Buick?

Common causes include a faulty battery cell, damaged wiring or connectors in the battery circuit, or a malfunctioning battery management system (BMS).

4. Can I continue driving my Buick with the P1E6F code?

It is not recommended to drive with this code for an extended period, as it may lead to reduced vehicle performance or further damage to the hybrid/electric system.

5. How is the P1E6F code diagnosed on a Buick?

A technician will typically use a scan tool to read the code, inspect the battery circuit for damaged wiring or connectors, and test the affected battery cell or module for proper voltage and resistance.

6. How do you fix the P1E6F code on a Buick?

Repairs may involve replacing a faulty battery cell, repairing damaged wiring or connections, or reprogramming/updating the battery management system.

7. Can a low battery cause the P1E6F code in a Buick?

While unlikely, a low auxiliary battery can sometimes trigger hybrid system errors. However, this code is usually related to a specific issue in the hybrid/electric battery circuit.

8. How much does it cost to repair the P1E6F code on a Buick?

Repair costs can vary widely depending on the issue, ranging from $100 for wiring repairs to over $1,000 if a battery module or controller needs replacement.

9. Does the P1E6F code mean the hybrid battery needs replacement?

Not necessarily. The issue could be with a specific cell, wiring, or the battery management system, rather than the entire hybrid battery.

10. Can I clear the P1E6F code without fixing the problem?

Clearing the code without addressing the underlying issue may temporarily reset the warning light, but the problem will likely return and could worsen over time.