AutoCodes – Chevrolet – P1E77 Chevrolet

P1E77 Chevrolet Code - Hybrid/Electric Vehicle Battery 76 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: P1E77 Chevrolet indicates Hybrid/Electric Vehicle Battery 76 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,149

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1E77 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 P1E77 Chevrolet - Hybrid/Electric Vehicle Battery 76 Circuit - AutoCodes.com — P1E77 Chevrolet Code - Hybrid/Electric Vehicle Battery 76 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E77 Chevrolet?

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

How to Fix the DTC P1E77 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 P1E77 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.

Need more information about the P1E77 Chevrolet code?

Need more information on how to fix the P1E77 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E77 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P1E77 Chevrolet Code

1. What are the common symptoms of OBDII code P1E77 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced electric drive performance, decreased fuel efficiency, and potential illumination of the check engine light.

2. What are some possible causes of OBDII code P1E77 in a Chevrolet hybrid/electric vehicle?

- Possible causes may include a faulty high voltage battery, issues with the battery management system, damaged wiring or connectors related to the battery, or a malfunctioning battery control module.

3. How can I diagnose the OBDII code P1E77 in my Chevrolet hybrid/electric vehicle?

- Diagnosing this code typically involves using a scan tool to read the code and accessing the hybrid/electric vehicle system to check for specific battery circuit issues.

4. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with OBDII code P1E77 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the high voltage battery system and potentially compromise the safety of the vehicle.

5. Can I repair OBDII code P1E77 in my Chevrolet hybrid/electric vehicle myself?

- Repairing this code often requires specialized knowledge and tools related to high voltage systems, so it is recommended to seek assistance from a qualified technician or dealership.

6. How much does it typically cost to repair OBDII code P1E77 in a Chevrolet hybrid/electric vehicle?

- The cost of repair can vary depending on the specific issue causing the code, but it may involve replacing components in the high voltage battery system, which can be a significant expense.

7. Are there any preventive maintenance tips to avoid OBDII code P1E77 in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting the high voltage battery system, ensuring proper charging habits, and following manufacturer-recommended maintenance schedules can help prevent issues that may trigger this code.

8. Can OBDII code P1E77 in a Chevrolet hybrid/electric vehicle affect the vehicle's overall performance?

- Yes, this code can impact the vehicle's overall performance by reducing electric drive capabilities, affecting fuel efficiency, and potentially causing drivability issues.

9. How urgent is it to address OBDII code P1E77 in a Chevrolet hybrid/electric vehicle?

- It is important to address this code promptly to prevent further damage to the high voltage battery system and ensure the safe operation of the vehicle.

10. Are there any recalls or technical service bulletins related to OBDII code P1E77 in Chevrolet hybrid/electric vehicles?

- It is recommended to check with Chevrolet dealerships or official sources for any recalls or technical service bulletins related to this specific OBDII code to stay informed about potential updates or remedies.