AutoCodes – Chevrolet – P1E66 Chevrolet

P1E66 Chevrolet Code - Hybrid/Electric Vehicle Battery 59 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: P1E66 Chevrolet indicates Hybrid/Electric Vehicle Battery 59 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 1,315

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 P1E66 Chevrolet 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 P1E66 Chevrolet - Hybrid/Electric Vehicle Battery 59 Circuit - AutoCodes.com — P1E66 Chevrolet Code - Hybrid/Electric Vehicle Battery 59 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E66 Chevrolet?

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

How to Fix the DTC P1E66 Chevrolet?

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 P1E66 Chevrolet 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 P1E66 Chevrolet Code

1. What are common symptoms of OBDII code P1E66 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and illuminated warning lights on the dashboard.

2. What does the OBDII code P1E66 Chevrolet Hybrid/Electric Vehicle Battery 59 Circuit indicate?

- This code indicates a problem with the circuit related to battery 59 in the hybrid or electric vehicle system.

3. What are possible causes of the P1E66 code in a Chevrolet hybrid/electric vehicle?

- Possible causes include a faulty battery 59, damaged wiring or connectors, issues with the battery management system, or a malfunctioning hybrid control module.

4. How can I diagnose the P1E66 code in my Chevrolet hybrid/electric vehicle?

- Diagnosis typically involves using a scan tool to read the code, inspecting the battery 59 circuit for damage, checking connections, and testing the hybrid system components.

5. Can I continue driving my Chevrolet hybrid/electric vehicle with the P1E66 fault code?

- It is not recommended to continue driving the vehicle with this fault code as it can lead to further damage to the hybrid system and potentially affect vehicle performance and safety.

6. How can I repair the P1E66 code on my Chevrolet hybrid/electric vehicle?

- Repair may involve replacing the faulty battery 59, repairing damaged wiring or connectors, resetting the hybrid control module, or addressing any issues with the battery management system.

7. Is it safe to attempt repairing the P1E66 code in a Chevrolet hybrid/electric vehicle myself?

- Due to the complexity of hybrid and electric vehicle systems, it is recommended to have the code diagnosed and repaired by a qualified technician with experience in hybrid vehicle maintenance.

8. How much does it typically cost to repair the P1E66 code in a Chevrolet hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the code and the required parts and labor. It is advisable to obtain a diagnosis and repair estimate from a reputable service center.

9. Can regular maintenance help prevent the occurrence of the P1E66 code in a Chevrolet hybrid/electric vehicle?

- Regular maintenance, including following the manufacturer's recommended service schedule for the hybrid system components, can help prevent issues that may trigger the P1E66 fault code.

10. Are there any recalls or service bulletins related to the P1E66 code in Chevrolet hybrid/electric vehicles?

- It is recommended to check with a Chevrolet dealership or the manufacturer's website for any recalls or service bulletins related to the P1E66 fault code in specific vehicle models.