AutoCodes – Chevrolet – P0B73 Chevrolet

P0B73 Chevrolet Code - Hybrid/Electric Vehicle Battery 12 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: P0B73 Chevrolet indicates Hybrid/Electric Vehicle Battery 12 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,038

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0B73 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 P0B73 Chevrolet - Hybrid/Electric Vehicle Battery 12 Circuit Performance - AutoCodes.com — P0B73 Chevrolet Code - Hybrid/Electric Vehicle Battery 12 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B73 Chevrolet?

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

How to Fix the DTC P0B73 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 P0B73 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.

Need more information about the P0B73 Chevrolet code?

Need more information on how to fix the P0B73 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B73 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P0B73 Chevrolet Code

1. What does OBDII code P0B73 for Chevrolet Hybrid/Electric Vehicle Battery 12 Circuit Performance indicate?

The code P0B73 indicates that there is a performance issue with the 12-volt circuit in the hybrid or electric vehicle battery system.

2. What are the common symptoms of OBDII code P0B73 in a Chevrolet hybrid or electric vehicle?

Common symptoms include difficulty starting the vehicle, dimming interior lights, erratic behavior of electronic components, and potential issues with the vehicle's overall performance.

3. What are some possible causes of OBDII code P0B73 in a Chevrolet hybrid or electric vehicle?

Possible causes include a faulty 12-volt battery, issues with the battery management system, wiring problems, or a malfunctioning battery control module.

4. How can I diagnose the underlying issue causing OBDII code P0B73 in my Chevrolet hybrid or electric vehicle?

Diagnosis typically involves checking the 12-volt battery for proper voltage, inspecting the wiring for any damage or loose connections, and using a diagnostic scanner to read additional fault codes related to the battery system.

5. Can I still drive my Chevrolet hybrid or electric vehicle with OBDII code P0B73 present?

It is not recommended to drive the vehicle for an extended period with this code present, as it can lead to further electrical system issues and potentially leave you stranded.

6. How can I reset OBDII code P0B73 in my Chevrolet hybrid or electric vehicle?

Resetting the code involves using an OBDII scanner to clear the code after addressing the underlying issue causing the fault. Simply clearing the code without fixing the problem will likely result in it reappearing.

7. What are some repair tips for addressing OBDII code P0B73 in a Chevrolet hybrid or electric vehicle?

Repair tips may include replacing the 12-volt battery if it is faulty, checking and repairing any damaged wiring, ensuring proper connections, and consulting a professional technician for further diagnosis if needed.

8. Is OBDII code P0B73 specific to Chevrolet hybrid and electric vehicles, or can it occur in other makes and models?

While this specific code is related to Chevrolet vehicles, similar performance issues with the 12-volt battery circuit can occur in other hybrid or electric vehicles as well.

9. How urgent is it to address OBDII code P0B73 in my Chevrolet hybrid or electric vehicle?

It is recommended to address this code promptly to prevent further electrical system issues and potential breakdowns. Ignoring the issue can lead to more expensive repairs down the line.

10. Can I prevent OBDII code P0B73 from occurring in my Chevrolet hybrid or electric vehicle?

Regular maintenance, such as checking the 12-volt battery's health, inspecting wiring for damage, and addressing any warning signs promptly, can help prevent this code from appearing in your Chevrolet hybrid or electric vehicle.