AutoCodes – GMC – P1B5E GMC

P1B5E GMC Code - Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage

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: P1B5E GMC indicates Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage.
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 855

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 P1B5E 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 P1B5E GMC - Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage - AutoCodes.com — P1B5E GMC Code - Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5E GMC?

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

How to Fix the DTC P1B5E 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 P1B5E 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 P1B5E GMC Code

1. What does the OBDII code P1B5E GMC indicate for a hybrid/electric vehicle?

The code P1B5E GMC specifically points to an issue with the Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage.

2. What are some common symptoms of the P1B5E code in a GMC hybrid/electric vehicle?

Common symptoms include reduced power, poor fuel economy, difficulty starting the vehicle, and potentially an illuminated check engine light.

3. What are possible causes of the Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage code in a GMC vehicle?

Potential causes can include a faulty battery pack, issues with the battery management system, damaged wiring, or a problem with the battery temperature sensor.

4. How can I diagnose the P1B5E code in my GMC hybrid/electric vehicle?

Diagnosing the code typically involves checking the battery voltage levels, inspecting the battery connections and wiring, and using a diagnostic scan tool to gather data from the vehicle's system.

5. Can I continue driving my GMC hybrid/electric vehicle with the P1B5E code present?

It is not recommended to continue driving the vehicle with the P1B5E code active, as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

6. What are some repair tips for addressing the Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage code in a GMC vehicle?

Repair tips may include checking and cleaning the battery terminals, inspecting for any visible damage to the battery pack, resetting the battery management system, and seeking professional assistance if needed.

7. Is it safe to attempt to reset the P1B5E code on my own in a GMC hybrid/electric vehicle?

Attempting to reset the code on your own may temporarily clear the warning light, but it is crucial to address the underlying issue causing the code for a lasting solution.

8. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 41 Circuit Low Voltage issue in a GMC hybrid/electric vehicle?

The cost of repairs can vary depending on the exact cause of the code, but it is advisable to budget for potential battery pack replacements or software updates from the manufacturer.

9. Can extreme weather conditions affect the occurrence of the P1B5E code in a GMC hybrid/electric vehicle?

Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery system and potentially trigger the Low Voltage code.

10. Are there any preventative maintenance steps I can take to avoid the P1B5E code in my GMC hybrid/electric vehicle?

Regularly monitoring the battery's health, keeping the connections clean and secure, and following the manufacturer's recommended maintenance schedule can help prevent issues leading to the P1B5E code.