AutoCodes – Chevrolet – P1B5F Chevrolet

P1B5F Chevrolet Code - Hybrid/Electric Vehicle Battery 41 Circuit High 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: P1B5F Chevrolet indicates Hybrid/Electric Vehicle Battery 41 Circuit High 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 834

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 P1B5F Chevrolet 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 P1B5F Chevrolet - Hybrid/Electric Vehicle Battery 41 Circuit High Voltage - AutoCodes.com — P1B5F Chevrolet Code - Hybrid/Electric Vehicle Battery 41 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5F Chevrolet?

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

How to Fix the DTC P1B5F Chevrolet?

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 P1B5F Chevrolet 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 P1B5F Chevrolet Code

What does the OBDII code P1B5F mean for a Chevrolet hybrid or electric vehicle?

The OBDII code P1B5F indicates a problem with the high voltage circuit of the hybrid or electric vehicle battery, specifically that the voltage in circuit 41 is higher than expected.

What are common symptoms of the P1B5F code?

Common symptoms include the illumination of the check engine light, reduced engine power, and possible issues with hybrid system performance, such as difficulty starting or a decrease in battery efficiency.

What could cause the P1B5F code to trigger?

Causes may include a faulty battery management system, damaged wiring or connectors in the high voltage circuit, defective battery cells, or issues with the hybrid system's control module.

How can I diagnose the P1B5F code?

To diagnose the P1B5F code, use an OBD-II scanner to confirm the code, inspect the high voltage connections and wiring for damage, and test the battery management system and individual battery cells for faults.

What repairs might be needed for the P1B5F code?

Repairs may involve replacing damaged wiring or connectors, repairing or replacing the battery management system, or replacing faulty battery cells to restore proper voltage levels in the circuit.

Can I drive my Chevrolet if the P1B5F code is present?

It is not advisable to drive the vehicle if the P1B5F code is present, as it may lead to reduced performance and could pose safety risks due to potential high voltage issues.

Is it safe to work on a hybrid or electric vehicle if I see the P1B5F code?

Working on a hybrid or electric vehicle can be dangerous due to high voltage components. It is recommended to have trained professionals handle repairs, especially when dealing with the battery and high voltage systems.

Can the P1B5F code reset itself after repairs?

Yes, the P1B5F code can reset itself after the underlying issue is resolved and the vehicle's computer has been reset, either manually or through the use of a diagnostic scanner.

How can I prevent the P1B5F code from reoccurring?

Regular maintenance, including inspections of the battery system and wiring, addressing any electrical issues promptly, and ensuring that the battery management system is functioning properly can help prevent the reoccurrence of the P1B5F code.