AutoCodes – Cadillac – P1B22 Cadillac

P1B22 Cadillac 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 Cadillac 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 796

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

What does this mean?

What are the Possible Causes of the DTC P1B22 Cadillac?

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

How to Fix the DTC P1B22 Cadillac?

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 Cadillac 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 Cadillac Code

What does the OBDII code P1B22 mean for my Cadillac?

The OBDII code P1B22 indicates a performance issue with the Hybrid/Electric Vehicle Battery 31 circuit, which could mean there is a problem with the battery or its connections.

What are the common symptoms of the P1B22 code?

Common symptoms include warning lights on the dashboard, reduced power or acceleration, and potential issues with the vehicle's hybrid system.

What could cause the P1B22 code to trigger?

The code can be triggered by faulty wiring, a defective battery, poor connections, or issues with the battery management system.

How can I diagnose the P1B22 code?

To diagnose the P1B22 code, check for any loose or damaged wiring in the battery circuit, inspect the battery for any signs of damage, and use a scan tool to retrieve additional codes for further insight.

Is it safe to drive my Cadillac with the P1B22 code?

While it may be possible to drive the vehicle, it's not recommended as it could lead to further battery issues or reduced vehicle performance. It's best to have it diagnosed and repaired promptly.

What repairs might be needed for the P1B22 code?

Repairs could include replacing damaged wiring, fixing poor connections, or replacing the hybrid battery if it is determined to be faulty.

Can I clear the P1B22 code myself?

You can clear the code using an OBDII scanner, but this will not fix the underlying issue. It's important to address the root cause to prevent the code from reappearing.

How much might it cost to repair the issue causing the P1B22 code?

Repair costs can vary widely depending on the specific issue, but battery replacements can be expensive, often ranging from $1,000 to $6,000, while wiring repairs may be less costly.

Should I take my Cadillac to a dealership for P1B22 code issues?

While you can take it to a dealership, a qualified mechanic experienced with hybrid vehicles can also diagnose and repair the issue effectively, often at a lower cost.