AutoCodes – GMC – P1B64 GMC

P1B64 GMC Code - Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage

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: P1B64 GMC indicates Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage.
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 1,010

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 P1B64 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 P1B64 GMC - Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage - AutoCodes.com — P1B64 GMC Code - Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B64 GMC?

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

How to Fix the DTC P1B64 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 P1B64 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 P1B64 GMC Code

1. What are the common symptoms of OBDII code P1B64 GMC (Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage)?

- Common symptoms include reduced hybrid/electric vehicle performance, difficulty starting the vehicle, and illuminated warning lights on the dashboard related to the hybrid/electric system.

2. What are the possible causes of OBDII code P1B64 GMC?

- The code P1B64 GMC may be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged battery cells, poor electrical connections, or a failing battery management system.

3. How can I diagnose the OBDII code P1B64 GMC?

- Diagnosing the code P1B64 GMC typically involves using a diagnostic scanner to read the code, checking the hybrid/electric vehicle battery voltage levels, inspecting battery connections, and performing a thorough inspection of the battery components.

4. What are some repair tips for resolving OBDII code P1B64 GMC?

- Repair tips for addressing the code P1B64 GMC may include replacing the hybrid/electric vehicle battery, repairing damaged wiring or connections, resetting the battery management system, or updating the vehicle's software as recommended by the manufacturer.

5. Can I drive my vehicle with OBDII code P1B64 GMC active?

- It is not recommended to drive your vehicle with the code P1B64 GMC active, as it can lead to further damage to the hybrid/electric system and potentially affect the overall performance and safety of the vehicle.

6. How much does it cost to repair OBDII code P1B64 GMC?

- The cost of repairing the OBDII code P1B64 GMC can vary depending on the underlying issue causing the code, the parts needed for repair, and the labor costs involved. It is recommended to consult with a professional mechanic for an accurate cost estimate.

7. Can I reset the OBDII code P1B64 GMC without fixing the underlying issue?

- While you can clear the code temporarily by resetting the vehicle's computer, it is crucial to address the underlying issue causing the code to prevent further damage and ensure the hybrid/electric system functions properly.

8. How often does OBDII code P1B64 GMC occur in hybrid/electric vehicles?

- The occurrence of the OBDII code P1B64 GMC in hybrid/electric vehicles can vary depending on the vehicle's age, maintenance history, and driving conditions. Regular maintenance and monitoring of the hybrid/electric system can help prevent this code from appearing.

9. Is it safe to attempt DIY repairs for OBDII code P1B64 GMC?

- Repairing the OBDII code P1B64 GMC often requires specialized knowledge and tools related to hybrid/electric vehicle systems. It is recommended to seek assistance from a qualified mechanic or technician experienced in working with hybrid/electric vehicles.

10. How can I prevent OBDII code P1B64 GMC from recurring in the future?

- To prevent the recurrence of the OBDII code P1B64 GMC, it is essential to follow the manufacturer's recommended maintenance schedule for the hybrid/electric system, address any issues promptly, and ensure the vehicle's battery and electrical components are in good condition.