AutoCodes – Cadillac – P1B64 Cadillac

P1B64 Cadillac 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 Cadillac 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 839

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

What does this mean?

What are the Possible Causes of the DTC P1B64 Cadillac?

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

How to Fix the DTC P1B64 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 P1B64 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 P1B64 Cadillac Code

1. What are the common symptoms of OBDII code P1B64 in a Cadillac Hybrid/Electric Vehicle?

The common symptoms include a noticeable decrease in hybrid battery performance, reduced fuel efficiency, and potential illumination of the hybrid system warning light.

2. What can cause the OBDII code P1B64 to appear in a Cadillac Hybrid/Electric Vehicle?

The code P1B64 typically indicates a low voltage condition in the Hybrid/Electric Vehicle Battery 43 circuit, which can be caused by a faulty hybrid battery pack, a weak battery cell, a malfunctioning battery management system, or wiring issues.

3. How can I diagnose the underlying issue behind the P1B64 code in my Cadillac Hybrid/Electric Vehicle?

Diagnosing the P1B64 code usually involves conducting a thorough inspection of the hybrid battery pack, checking the battery voltage levels, testing the battery management system, and inspecting the wiring and connectors related to Battery 43 circuit.

4. Is it safe to continue driving my Cadillac Hybrid/Electric Vehicle with the P1B64 code illuminated?

It is not recommended to drive the vehicle extensively with the P1B64 code present, as it can lead to further damage to the hybrid battery system and potentially affect the vehicle's performance and safety.

5. How can I clear the P1B64 code in my Cadillac Hybrid/Electric Vehicle?

Clearing the P1B64 code can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is crucial to address the underlying issue causing the code before clearing it.

6. Can I repair the OBDII code P1B64 in my Cadillac Hybrid/Electric Vehicle myself?

Repairing the P1B64 code may require specialized tools and knowledge about hybrid and electric vehicle systems. It is recommended to seek assistance from a qualified technician or a dealership familiar with hybrid vehicle repairs.

7. What are the potential repair options for fixing the P1B64 code in a Cadillac Hybrid/Electric Vehicle?

Repair options may include replacing the faulty battery cell, repairing the battery management system, fixing wiring issues, or replacing the entire hybrid battery pack, depending on the exact cause of the low voltage condition.

8. How much does it typically cost to repair the OBDII code P1B64 in a Cadillac Hybrid/Electric Vehicle?

The cost of repairing the P1B64 code can vary significantly depending on the extent of the damage, parts needed, labor costs, and whether the repair is done at a dealership or an independent repair shop. It is advisable to obtain multiple quotes for comparison.

9. Can a DIY enthusiast attempt to troubleshoot the P1B64 code in a Cadillac Hybrid/Electric Vehicle?

While basic troubleshooting steps like checking battery connections and fuses can be done by a DIY enthusiast, diagnosing and repairing complex issues related to the hybrid battery system should be left to professionals with the necessary expertise and tools.

10. How often does the OBDII code P1B64 occur in Cadillac Hybrid/Electric Vehicles?

The occurrence of the P1B64 code can vary depending on the age, usage, and maintenance of the vehicle. Regular maintenance and monitoring of the hybrid battery system can help prevent issues that trigger this code.