AutoCodes – Cadillac – P1B67 Cadillac

P1B67 Cadillac Code - Hybrid/Electric Vehicle Battery 44 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: P1B67 Cadillac indicates Hybrid/Electric Vehicle Battery 44 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 734

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 P1B67 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 P1B67 Cadillac - Hybrid/Electric Vehicle Battery 44 Circuit Low Voltage - AutoCodes.com — P1B67 Cadillac Code - Hybrid/Electric Vehicle Battery 44 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B67 Cadillac?

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

How to Fix the DTC P1B67 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 P1B67 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 P1B67 Cadillac Code

1. What are the common symptoms of OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced electric vehicle range, poor overall vehicle performance, and potentially difficulty starting the vehicle.

2. What can cause the OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle?

- This code is typically triggered by low voltage in the hybrid/electric vehicle battery 44 circuit, which can be caused by a failing battery, damaged wiring, or a faulty battery management system.

3. How serious is the OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle?

- This code should be addressed promptly as it can lead to reduced vehicle efficiency and potential drivability issues. Ignoring the issue may result in further damage to the vehicle's battery system.

4. Can I continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P1B67?

- It is not recommended to drive the vehicle with this code present, as it can impact the performance and safety of the vehicle. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the OBDII code P1B67 in my Cadillac Hybrid/Electric Vehicle?

- Proper diagnosis typically involves using a diagnostic scanner to read the code and then further testing the hybrid/electric vehicle battery, wiring, and related components to pinpoint the exact cause of the low voltage issue.

6. What are some potential repair tips for the OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking and replacing the hybrid/electric vehicle battery if necessary, inspecting and repairing any damaged wiring, and ensuring the battery management system is functioning correctly.

7. How much does it cost to repair the OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is recommended to consult with a professional technician for an accurate estimate.

8. Can resetting the OBDII code P1B67 in a Cadillac Hybrid/Electric Vehicle fix the issue?

- While resetting the code may temporarily clear the warning light, it will not address the underlying problem causing the low voltage issue. It is crucial to diagnose and repair the root cause of the code.

9. Is the OBDII code P1B67 specific to Cadillac vehicles only?

- The code P1B67 related to Hybrid/Electric Vehicle Battery 44 Circuit Low Voltage is specific to Cadillac Hybrid/Electric Vehicles and may not apply to other vehicle makes and models.

10. What preventive measures can I take to avoid the OBDII code P1B67 in my Cadillac Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric vehicle battery system, including monitoring voltage levels and addressing any warning signs promptly, can help prevent the occurrence of code P1B67 and related issues.