AutoCodes – GMC – P1B45 GMC

P1B45 GMC Code - Hybrid/Electric Vehicle Battery 33 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: P1B45 GMC indicates Hybrid/Electric Vehicle Battery 33 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 776

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B45 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 P1B45 GMC - Hybrid/Electric Vehicle Battery 33 Circuit Performance - AutoCodes.com — P1B45 GMC Code - Hybrid/Electric Vehicle Battery 33 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B45 GMC?

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

How to Fix the DTC P1B45 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 P1B45 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 P1B45 GMC Code

1. What are the common symptoms of OBDII code P1B45 GMC related to the Hybrid/Electric Vehicle Battery 33 Circuit Performance?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potentially a warning light on the dashboard.

2. What are the possible causes of OBDII code P1B45 GMC indicating Hybrid/Electric Vehicle Battery 33 Circuit Performance issues?

- Possible causes include a faulty hybrid/electric vehicle battery, damaged wiring or connectors in the circuit, or issues with the battery management system.

3. How can I diagnose the OBDII code P1B45 GMC for Hybrid/Electric Vehicle Battery 33 Circuit Performance problems?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking the battery and circuit connections, and conducting a thorough inspection of the battery system.

4. Can I continue driving my vehicle with the OBDII code P1B45 GMC triggered for Hybrid/Electric Vehicle Battery 33 Circuit Performance?

- It is not recommended to continue driving the vehicle with this code triggered, as it can lead to further damage to the hybrid/electric vehicle system and potentially cause safety hazards.

5. What are the repair options for fixing OBDII code P1B45 GMC due to Hybrid/Electric Vehicle Battery 33 Circuit Performance issues?

- Repair options may include replacing the hybrid/electric vehicle battery, repairing damaged wiring or connectors, resetting the battery management system, or seeking professional assistance from a certified technician.

6. Is it possible to reset the OBDII code P1B45 GMC related to Hybrid/Electric Vehicle Battery 33 Circuit Performance without fixing the underlying issue?

- While you can clear the code temporarily, it is crucial to address the root cause of the problem to prevent further issues with the hybrid/electric vehicle system.

7. How do I prevent OBDII code P1B45 GMC from reoccurring in my GMC hybrid/electric vehicle?

- To prevent the code from reoccurring, it is essential to perform regular maintenance on the hybrid/electric vehicle battery system, inspect wiring and connectors for damage, and address any issues promptly.

8. Can extreme weather conditions impact the triggering of OBDII code P1B45 GMC for Hybrid/Electric Vehicle Battery 33 Circuit Performance?

- Yes, extreme temperatures can affect the performance of the hybrid/electric vehicle battery and circuit, potentially leading to the triggering of the OBDII code. It is important to monitor the battery in such conditions.

9. How long does it typically take to repair OBDII code P1B45 GMC associated with Hybrid/Electric Vehicle Battery 33 Circuit Performance?

- The repair time can vary depending on the exact cause of the issue. It may range from a few hours to a day, especially if complex diagnostics and replacement of components are required.

10. Is it necessary to take my GMC hybrid/electric vehicle to a dealership for repairs related to OBDII code P1B45 GMC Hybrid/Electric Vehicle Battery 33 Circuit Performance?

- While a dealership may have specialized knowledge and tools for hybrid/electric vehicles, certified independent mechanics with experience in hybrid systems can also effectively diagnose and repair the issue.