AutoCodes – Chevrolet – P1B22 Chevrolet

P1B22 Chevrolet Code - Hybrid/Electric Vehicle Battery 31 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: P1B22 Chevrolet indicates Hybrid/Electric Vehicle Battery 31 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 938

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 P1B22 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 P1B22 Chevrolet - Hybrid/Electric Vehicle Battery 31 Circuit Performance - AutoCodes.com — P1B22 Chevrolet Code - Hybrid/Electric Vehicle Battery 31 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B22 Chevrolet?

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

How to Fix the DTC P1B22 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 P1B22 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 P1B22 Chevrolet Code

1. What does the OBDII code P1B22 mean on a Chevrolet?

P1B22 indicates an issue with the performance of circuit 31 in the hybrid or electric vehicle battery system, which could affect the vehicle's ability to manage battery performance.

2. What are the common symptoms of a P1B22 code?

Symptoms may include reduced hybrid or electric vehicle performance, a check engine light or service hybrid system warning, and possibly decreased battery efficiency.

3. What causes the P1B22 code in a Chevrolet?

Possible causes include a faulty battery circuit, damaged wiring or connectors in circuit 31, a failing hybrid battery module, or issues with the battery management system.

4. Can a P1B22 code cause drivability problems?

Yes, it can lead to reduced power, limited electric-only operation, or the vehicle operating in a fail-safe or reduced performance mode.

5. How is the P1B22 code diagnosed?

Technicians typically use a diagnostic scanner to confirm the code, inspect circuit 31's wiring and connectors, and perform tests on the hybrid battery and related components.

6. Is it safe to drive with a P1B22 code?

Driving with a P1B22 code may be possible, but it is not recommended as it could lead to further damage to the hybrid system or leave the vehicle stranded.

7. How can I fix a P1B22 code on my Chevrolet?

Repairs may involve replacing damaged wiring or connectors, reprogramming or replacing the battery control module, or servicing or replacing the hybrid battery pack.

8. What tools are needed to diagnose a P1B22 code?

Youâ€™ll need an OBDII scanner capable of reading hybrid system codes, a multimeter for electrical testing, and access to the vehicleâ€™s wiring diagrams.

9. How much does it cost to repair a P1B22 code?

Repair costs vary widely, ranging from $100 for simple wiring repairs to several thousand dollars if the hybrid battery pack or control module needs replacement.

10. Can a low-voltage battery cause a P1B22 code?

While unlikely, a low or failing 12V auxiliary battery can sometimes affect hybrid system diagnostics. Itâ€™s worth checking and addressing the 12V battery health during the diagnostic process.