AutoCodes – Buick – P1B22 Buick

P1B22 Buick 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 Buick 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 736

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

What does this mean?

What are the Possible Causes of the DTC P1B22 Buick?

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

How to Fix the DTC P1B22 Buick?

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 Buick 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 Buick Code

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

P1B22 indicates a performance issue in the hybrid/electric vehicle (HEV) battery circuit 31, which monitors or controls specific battery functions.

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

Symptoms may include an illuminated check engine light, reduced hybrid system performance, poor fuel economy, or limited electric drive capability.

3. What causes the P1B22 code on a Buick?

Common causes include a faulty battery module, damaged wiring in the circuit, poor electrical connections, or a malfunctioning battery management system.

4. Can the P1B22 code cause drivability issues?

Yes, it can lead to limited hybrid system functionality, reduced power, or the vehicle operating primarily on the internal combustion engine.

5. How is the P1B22 code diagnosed?

A technician will use a diagnostic scanner to retrieve the code, inspect the hybrid battery system, check for wiring or connection issues, and test the affected battery module.

6. Can I drive my Buick with the P1B22 code?

While the car may remain drivable, ignoring the issue could lead to further damage or reduced hybrid system efficiency. Prompt diagnosis is recommended.

7. How do you fix the P1B22 code on a Buick?

Repairs may involve replacing the faulty battery module, repairing damaged wiring, cleaning or tightening electrical connections, or updating the battery management system software.

8. How much does it cost to fix the P1B22 code?

Repair costs vary but may range from $150 for wiring repairs to over $1,000 if the hybrid battery module needs replacement.

9. Is the P1B22 code covered under warranty?

In many cases, hybrid battery components are covered under extended warranties. Check with your dealership or ownerâ€™s manual for details.

10. Can a dead 12-volt battery cause the P1B22 code?

No, the P1B22 code specifically relates to the hybrid battery system and not the 12-volt auxiliary battery. However, a weak 12-volt battery could affect diagnostic readings.