AutoCodes – GMC – P1E7B GMC

P1E7B GMC Code - Hybrid/Electric Vehicle Battery 80 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: P1E7B GMC indicates Hybrid/Electric Vehicle Battery 80 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 726

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 P1E7B 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 P1E7B GMC - Hybrid/Electric Vehicle Battery 80 Circuit - AutoCodes.com — P1E7B GMC Code - Hybrid/Electric Vehicle Battery 80 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7B GMC?

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

How to Fix the DTC P1E7B 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 P1E7B 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 P1E7B GMC Code

1. What are the common symptoms of OBDII code P1E7B GMC related to the Hybrid/Electric Vehicle Battery 80 Circuit?

- Common symptoms include reduced hybrid system performance, poor fuel efficiency, and potential illumination of the hybrid system warning light.

2. What are the possible causes of OBDII code P1E7B GMC indicating an issue with the Hybrid/Electric Vehicle Battery 80 Circuit?

- Potential causes may include a faulty hybrid/electric vehicle battery, damaged wiring or connectors in the circuit, or issues with the battery management system.

3. How can I diagnose the OBDII code P1E7B GMC related to the Hybrid/Electric Vehicle Battery 80 Circuit?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code, inspecting the battery and related components for any visible damage, and conducting a thorough electrical system test.

4. Is it safe to continue driving with OBDII code P1E7B GMC indicating a problem with the Hybrid/Electric Vehicle Battery 80 Circuit?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the hybrid system components and potentially result in unsafe driving conditions.

5. Can I repair OBDII code P1E7B GMC related to the Hybrid/Electric Vehicle Battery 80 Circuit myself?

- Repairing this code may require specialized knowledge and tools related to hybrid/electric vehicle systems, so it is advisable to seek professional assistance from a qualified technician or dealership.

6. What are some general tips for maintaining the Hybrid/Electric Vehicle Battery 80 Circuit to prevent OBDII code P1E7B GMC from recurring?

- Regularly inspect and maintain the hybrid/electric vehicle battery, ensure proper charging habits, and promptly address any issues with the electrical system to prevent code recurrence.

7. How much does it typically cost to repair OBDII code P1E7B GMC linked to the Hybrid/Electric Vehicle Battery 80 Circuit?

- Repair costs can vary depending on the extent of the issue, parts needed for replacement, and labor rates, so it is best to obtain a detailed quote from a professional technician.

8. Are there any recalls or technical service bulletins related to OBDII code P1E7B GMC involving the Hybrid/Electric Vehicle Battery 80 Circuit?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any relevant recalls or technical service bulletins addressing this specific OBDII code and associated concerns.

9. Can a low or failing 12-volt battery cause OBDII code P1E7B GMC to appear in relation to the Hybrid/Electric Vehicle Battery 80 Circuit?

- Yes, issues with the 12-volt auxiliary battery can sometimes trigger fault codes related to the hybrid/electric vehicle battery circuit, so it is recommended to ensure the auxiliary battery is functioning properly.

10. How long does it typically take to repair OBDII code P1E7B GMC related to the Hybrid/Electric Vehicle Battery 80 Circuit?

- The repair duration can vary based on the complexity of the issue, availability of parts, and workload at the repair facility, so it is best to inquire with the technician performing the repair for an estimated timeline.