AutoCodes – GMC – P1E51 GMC

P1E51 GMC Code - Hybrid/Electric Vehicle Battery 38 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: P1E51 GMC indicates Hybrid/Electric Vehicle Battery 38 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 819

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E51 GMC 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 P1E51 GMC - Hybrid/Electric Vehicle Battery 38 Circuit - AutoCodes.com — P1E51 GMC Code - Hybrid/Electric Vehicle Battery 38 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E51 GMC?

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

How to Fix the DTC P1E51 GMC?

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 P1E51 GMC 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 P1E51 GMC Code

1. What are the common symptoms of OBDII code P1E51 GMC related to the Hybrid/Electric Vehicle Battery 38 Circuit?

- Common symptoms include issues with battery charging, reduced electric range, and warning lights related to the hybrid/electric system.

2. What are the possible causes of OBDII code P1E51 GMC indicating a problem with the Hybrid/Electric Vehicle Battery 38 Circuit?

- Potential causes can include a faulty battery pack, damaged wiring or connectors, issues with the battery cooling system, or problems with the battery control module.

3. How can I diagnose the OBDII code P1E51 GMC related to the Hybrid/Electric Vehicle Battery 38 Circuit?

- Diagnosing this code typically involves using a specialized diagnostic scanner to retrieve specific data related to the battery system, testing the battery cells, and inspecting the electrical connections.

4. Is it safe to continue driving my vehicle with OBDII code P1E51 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 38 Circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially affect the vehicle's overall performance.

5. How can I repair OBDII code P1E51 GMC associated with the Hybrid/Electric Vehicle Battery 38 Circuit?

- Repairing this code may involve replacing the faulty battery components, repairing damaged wiring or connectors, recalibrating the battery control module, or addressing any cooling system issues.

6. Are there any maintenance tips to prevent OBDII code P1E51 GMC from reoccurring in the future?

- Regularly inspecting the battery system, keeping up with recommended maintenance schedules, and avoiding overcharging or deep discharging the battery can help prevent this code from reoccurring.

7. Can a DIY enthusiast fix OBDII code P1E51 GMC related to the Hybrid/Electric Vehicle Battery 38 Circuit?

- While some basic troubleshooting and inspections can be done by a DIY enthusiast, fixing this code often requires specialized knowledge and tools, so it is recommended to seek professional assistance.

8. Will resetting the OBDII code P1E51 GMC clear the issue with the Hybrid/Electric Vehicle Battery 38 Circuit?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the code. It's important to diagnose and repair the root cause of the problem.

9. How long does it typically take to repair OBDII code P1E51 GMC related to the Hybrid/Electric Vehicle Battery 38 Circuit?

- The repair time can vary depending on the specific cause of the code, but it may take a few hours to a full day for a professional technician to diagnose and repair the issue.

10. What are the potential risks of ignoring OBDII code P1E51 GMC associated with the Hybrid/Electric Vehicle Battery 38 Circuit?

- Ignoring this code can lead to further damage to the hybrid/electric system, reduced vehicle performance, and potentially unsafe driving conditions. It's important to address the issue promptly.