AutoCodes – GMC – P1B7E GMC

P1B7E GMC Code - Hybrid/Electric Vehicle Battery 52 Circuit Performance

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: P1B7E GMC indicates Hybrid/Electric Vehicle Battery 52 Circuit Performance.
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 771

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B7E 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 P1B7E GMC - Hybrid/Electric Vehicle Battery 52 Circuit Performance - AutoCodes.com — P1B7E GMC Code - Hybrid/Electric Vehicle Battery 52 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B7E GMC?

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

How to Fix the DTC P1B7E 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 P1B7E 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 P1B7E GMC Code

1. What are common symptoms of OBDII code P1B7E GMC related to Hybrid/Electric Vehicle Battery 52 Circuit Performance?

Symptoms may include reduced hybrid system performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are some possible causes of OBDII code P1B7E GMC indicating issues with the Hybrid/Electric Vehicle Battery 52 Circuit?

Potential causes include a faulty high voltage battery, issues with the battery management system, damaged wiring or connectors, or a malfunctioning battery control module.

3. How can I diagnose the source of OBDII code P1B7E GMC affecting the Hybrid/Electric Vehicle Battery 52 Circuit?

Diagnosis typically involves conducting a thorough inspection of the high voltage battery, checking the battery management system for faults, and using a diagnostic scanner to pinpoint the exact issue within the circuit.

4. Are there any safety precautions to consider when working on the Hybrid/Electric Vehicle Battery 52 Circuit related to OBDII code P1B7E GMC?

It is crucial to follow proper safety procedures when dealing with high voltage systems. Ensure the vehicle is powered off, wear appropriate personal protective equipment, and consider seeking assistance from a qualified technician.

5. How can I repair OBDII code P1B7E GMC linked to Hybrid/Electric Vehicle Battery 52 Circuit Performance?

Repair methods may include replacing a faulty high voltage battery, repairing damaged wiring or connectors, resetting the battery control module, or reprogramming the battery management system.

6. Can resetting the OBDII code P1B7E GMC resolve issues with the Hybrid/Electric Vehicle Battery 52 Circuit?

Resetting the code may temporarily clear the warning light, but it is essential to address the underlying issue causing the code to prevent further problems with the hybrid system.

7. Is it safe to continue driving with OBDII code P1B7E GMC triggered by Hybrid/Electric Vehicle Battery 52 Circuit Performance issues?

It is not recommended to drive the vehicle with unresolved battery circuit performance problems, as it can lead to further damage to the hybrid system and potentially unsafe driving conditions.

8. How often should the Hybrid/Electric Vehicle Battery 52 Circuit be inspected to prevent OBDII code P1B7E GMC from recurring?

Regular inspections of the high voltage battery system, battery management components, and circuit connections are recommended as part of routine maintenance for hybrid or electric vehicles.

9. Can extreme weather conditions impact the occurrence of OBDII code P1B7E GMC related to Hybrid/Electric Vehicle Battery 52 Circuit Performance?

Extreme temperatures or environmental factors can sometimes exacerbate issues with the battery circuit performance, making it important to monitor the system's health in varying conditions.

10. Are there specific maintenance tips to help prevent OBDII code P1B7E GMC issues associated with Hybrid/Electric Vehicle Battery 52 Circuit Performance?

Regularly checking the battery system, keeping connectors clean and secure, following manufacturer maintenance schedules, and avoiding overcharging can help prevent issues leading to the code.