AutoCodes – Buick – P1B67 Buick

P1B67 Buick 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 Buick 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 784

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P1B67 Buick?

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

How to Fix the DTC P1B67 Buick?

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 Buick 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.

Need more information about the P1B67 Buick code?

Need more information on how to fix the P1B67 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B67 Buick code diagnosed by a professional: Find a repair shop in your area

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 Buick Code

1. What does the OBDII code P1B67 mean on a Buick?

P1B67 indicates a low voltage issue in the Hybrid/Electric Vehicle Battery 44 circuit, which is part of the high-voltage battery system.

2. What are the common symptoms of code P1B67 on a Buick?

Symptoms include reduced fuel economy, limited hybrid or EV functionality, warning lights on the dashboard, or poor vehicle performance.

3. What causes the P1B67 code to appear on a Buick?

Common causes include a faulty battery cell, damaged wiring in the Battery 44 circuit, a defective battery control module, or poor terminal connections.

4. Can I drive my Buick with the P1B67 code active?

Itâ€™s not recommended to drive with this code active, as it may limit vehicle performance and could lead to further damage to the hybrid or electric system.

5. How is the P1B67 code diagnosed in a Buick?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors in the Battery 44 circuit, and perform voltage checks on the affected circuit.

6. How can I fix the P1B67 code on my Buick?

Repairs may involve replacing a faulty battery cell, repairing or replacing damaged wiring, cleaning or tightening connections, or replacing the battery control module.

7. Could a weak 12V battery cause the P1B67 code?

While unlikely, a weak 12V battery can sometimes interfere with hybrid system diagnostics and should be checked as part of the troubleshooting process.

8. Does the P1B67 code mean I need to replace the entire hybrid battery?

Not necessarily. The issue may be isolated to a specific circuit or cell, and repairs may not require a full battery replacement.

9. How much does it cost to fix the P1B67 code on a Buick?

Repair costs vary depending on the issue but can range from $200 for minor wiring repairs to over $1,000 if a battery module or cells need replacement.

10. Can I reset the P1B67 code without repairs?

Clearing the code without addressing the root cause is not recommended, as the issue will likely return and could cause further damage.