AutoCodes – GMC – P0B45 GMC

P0B45 GMC Code - Hybrid/Electric Vehicle Battery 3 Circuit

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: P0B45 GMC indicates Hybrid/Electric Vehicle Battery 3 Circuit.
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 887

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B45 GMC 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 P0B45 GMC - Hybrid/Electric Vehicle Battery 3 Circuit - AutoCodes.com — P0B45 GMC Code - Hybrid/Electric Vehicle Battery 3 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B45 GMC?

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

How to Fix the DTC P0B45 GMC?

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 P0B45 GMC 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 P0B45 GMC Code

1. What are the common symptoms of OBDII code P0B45 in a GMC hybrid/electric vehicle?

The common symptoms include poor fuel efficiency, reduced performance, and possibly the vehicle going into limp mode.

2. What could cause the OBDII code P0B45 in a GMC hybrid/electric vehicle?

This code is typically triggered by issues with the hybrid/electric vehicle battery 3 circuit, such as a faulty battery module or a wiring problem.

3. How can I diagnose the cause of OBDII code P0B45 in my GMC hybrid/electric vehicle?

Diagnosing this code usually involves conducting a thorough inspection of the battery 3 circuit components, checking for loose connections, and using a diagnostic scan tool to gather more information.

4. Can I still drive my GMC hybrid/electric vehicle with the OBDII code P0B45 present?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the battery system and potentially cause safety issues.

5. How can I repair OBDII code P0B45 in my GMC hybrid/electric vehicle?

Repairing this code often involves replacing a faulty battery module, repairing damaged wiring, or addressing any other issues identified during the diagnostic process.

6. Are there any safety precautions to consider when working on the hybrid/electric vehicle battery system?

Yes, it is crucial to follow manufacturer guidelines and disconnect the high-voltage system properly to avoid the risk of electric shock or injury.

7. What is the typical cost to repair OBDII code P0B45 in a GMC hybrid/electric vehicle?

The cost of repair can vary depending on the extent of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. How often does the OBDII code P0B45 occur in GMC hybrid/electric vehicles?

While it is not as common as some other codes, P0B45 can still occur in GMC hybrid/electric vehicles, especially as they age and the battery system components wear out.

9. Can I reset the OBDII code P0B45 in my GMC hybrid/electric vehicle without repairing the issue?

Resetting the code without addressing the underlying problem will only temporarily clear the warning light, and the issue will likely reappear once the system detects the fault again.

10. Is it recommended to seek professional help for diagnosing and repairing OBDII code P0B45 in a GMC hybrid/electric vehicle?

Yes, it is advisable to consult a certified mechanic or dealership with experience in hybrid/electric vehicle systems to accurately diagnose and repair the underlying cause of this code.