AutoCodes – Chevrolet – P1E56 Chevrolet

P1E56 Chevrolet Code - Hybrid/Electric Vehicle Battery 43 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: P1E56 Chevrolet indicates Hybrid/Electric Vehicle Battery 43 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 788

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 P1E56 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 P1E56 Chevrolet - Hybrid/Electric Vehicle Battery 43 Circuit - AutoCodes.com — P1E56 Chevrolet Code - Hybrid/Electric Vehicle Battery 43 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E56 Chevrolet?

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

How to Fix the DTC P1E56 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 P1E56 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 P1E56 Chevrolet Code

1. What does the OBDII code P1E56 mean on a Chevrolet?

The P1E56 code indicates an issue with the Hybrid/Electric Vehicle Battery 43 Circuit, typically related to a specific voltage or communication problem within the battery system.

2. What are the common symptoms of the P1E56 code?

Common symptoms include a Check Engine Light, reduced hybrid or electric vehicle performance, limited battery charging or discharging capabilities, and possible activation of "Limp Mode."

3. What causes the P1E56 code to appear?

The code can be triggered by faulty battery sensors, damaged wiring or connectors in the battery circuit, software issues in the Battery Energy Control Module (BECM), or degradation of specific battery cells.

4. How serious is the P1E56 code on a Chevrolet hybrid or EV?

This code is moderately serious, as it can lead to reduced vehicle performance or prevent the hybrid/electric system from functioning correctly. Immediate diagnosis and repair are recommended.

5. Can I drive my Chevrolet with the P1E56 code?

While you may be able to drive the vehicle, it is not advisable as the issue could worsen and potentially cause further damage to the battery system.

6. How is the P1E56 code diagnosed?

A technician will use a scan tool to read the code and check live data from the battery system. They may also inspect wiring, connectors, and the battery control module for faults.

7. What repairs can fix the P1E56 code?

Repairs may include replacing damaged wiring or connectors, recalibrating or reprogramming the Battery Energy Control Module, or replacing faulty sensors or battery cells.

8. How much does it cost to fix the P1E56 code?

Repair costs vary depending on the issue. Replacing wiring or sensors may cost a few hundred dollars, while battery module repairs or replacements can cost significantly more.

9. Can a software update fix the P1E56 code?

In some cases, a software update to the Battery Energy Control Module or related systems can resolve the issue if it is caused by a programming bug.

10. How can I prevent the P1E56 code from recurring?

Regular maintenance, including checking battery system connections and keeping the hybrid/electric system software up to date, can help prevent this code from reappearing.