AutoCodes – Generic – P1E56

P1E56 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 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 1,121

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

What does this mean?

What are the Possible Causes of the DTC P1E56?

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

How to Fix the DTC P1E56?

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 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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Information for Specific Makes

P1E56 Buick — Hybrid/Electric Vehicle Battery 43 Circuit
P1E56 Cadillac — Hybrid/Electric Vehicle Battery 43 Circuit
P1E56 Chevrolet — Hybrid/Electric Vehicle Battery 43 Circuit
P1E56 GMC — Hybrid/Electric Vehicle Battery 43 Circuit
P1E56 Saturn — Hybrid/Electric Vehicle Battery 43 Circuit

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 Code

1. What are the common symptoms of OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

The common symptoms of code P1E56 may include reduced hybrid system performance, decreased fuel efficiency, and a warning light illuminated on the dashboard.

2. What are some possible causes of OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

Possible causes of code P1E56 include faulty battery pack 43, issues with the battery management system, wiring problems, or a malfunctioning hybrid control module.

3. How can I diagnose the OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

Diagnosing code P1E56 typically involves using a professional OBDII scanner to read the code, checking the battery pack 43 for any visible damage, inspecting the wiring for any signs of wear or corrosion, and testing the hybrid control module.

4. Can I drive my vehicle with OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

It is not recommended to drive your vehicle with code P1E56 present, as it can lead to further damage to the hybrid/electric system. It's best to have the issue diagnosed and repaired promptly.

5. What are some repair tips for fixing OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

Repair tips for resolving code P1E56 may include replacing the faulty battery pack 43, repairing any damaged wiring, recalibrating the battery management system, or reprogramming the hybrid control module.

6. Is it safe to reset the OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit) and continue driving?

Resetting the code without addressing the underlying issue is not recommended, as the problem may persist and potentially worsen over time. It's crucial to diagnose and repair the root cause of the code.

7. How much does it typically cost to repair OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

The cost of repairing code P1E56 can vary depending on the exact cause of the issue, the extent of the repairs needed, and labor rates in your area. It's advisable to consult a professional technician for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit) at home?

While some simple checks like inspecting wiring connections can be done at home, diagnosing and repairing code P1E56 often requires specialized tools and expertise. It's recommended to seek professional help for this issue.

9. How often does OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit) occur in hybrid/electric vehicles?

Code P1E56 is relatively uncommon but can occur in hybrid/electric vehicles when there are issues with the specific battery pack 43 or related components. Regular maintenance and inspections can help prevent such codes from appearing.

10. Are there any recalls or technical service bulletins related to OBDII code P1E56 (Hybrid/Electric Vehicle Battery 43 Circuit)?

Manufacturers may release recalls or technical service bulletins related to code P1E56 for specific vehicle models. It's advisable to check with the manufacturer or a dealership to see if any relevant information is available for your vehicle.