AutoCodes – Chevrolet – P1B19 Chevrolet

P1B19 Chevrolet Code - Hybrid/Electric Vehicle Battery 28 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: P1B19 Chevrolet indicates Hybrid/Electric Vehicle Battery 28 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 847

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B19 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 P1B19 Chevrolet - Hybrid/Electric Vehicle Battery 28 Circuit Performance - AutoCodes.com — P1B19 Chevrolet Code - Hybrid/Electric Vehicle Battery 28 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B19 Chevrolet?

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

How to Fix the DTC P1B19 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 P1B19 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 P1B19 Chevrolet Code

What does the OBDII code P1B19 mean on a Chevrolet vehicle?

1. Code P1B19 indicates an issue with the performance of the Hybrid/Electric Vehicle Battery 28 Circuit, which monitors or controls one of the battery modules in the hybrid or electric vehicle system. 2.

What are common symptoms of a P1B19 code in a Chevrolet vehicle?

Common symptoms include reduced fuel efficiency, limited hybrid or electric functionality, an illuminated check engine light, and potential vehicle performance issues. 3.

What causes a P1B19 code in a Chevrolet hybrid or electric vehicle?

This code is typically caused by a malfunction in the battery module, a wiring issue, a failed battery sensor, poor electrical connections, or a software issue in the battery control module. 4.

Can I drive my Chevrolet with a P1B19 code?

While the vehicle may still be drivable, it may operate in a reduced performance mode. It's recommended to address the issue promptly to avoid further damage to the hybrid/electric system. 5.

How is the P1B19 code diagnosed on a Chevrolet?

A technician will use a scan tool to read the code, inspect the battery control module, check wiring and connectors, and test the affected battery circuit for proper voltage and resistance. 6.

What repairs can fix a P1B19 code in a Chevrolet?

Repairs may include replacing a faulty battery module, repairing or replacing damaged wiring, cleaning or tightening electrical connections, or updating the battery control module software. 7.

Could a weak hybrid battery cause the P1B19 code?

Yes, a weak or failing hybrid battery module can lead to this code if it affects the performance of the Battery 28 Circuit. 8.

Is P1B19 specific to Chevrolet vehicles?

No, P1B19 may appear in other hybrid or electric vehicles, but the specific diagnostic and repair procedures may vary by manufacturer. 9.

What tools are needed to fix a P1B19 code?

Common tools include an advanced OBDII scan tool, a multimeter for electrical testing, and possibly manufacturer-specific diagnostic equipment for hybrid or electric systems. 10.

How much does it cost to fix a P1B19 code on a Chevrolet vehicle?

Repair costs can vary depending on the issue but may range from $200 to over $1,000, especially if the hybrid battery or control module needs replacement.