AutoCodes – Buick – P1B26 Buick

P1B26 Buick Code - Hybrid/Electric Vehicle Battery 32 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: P1B26 Buick indicates Hybrid/Electric Vehicle Battery 32 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 900

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B26 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 P1B26 Buick - Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage - AutoCodes.com — P1B26 Buick Code - Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B26 Buick?

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

How to Fix the DTC P1B26 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 P1B26 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.

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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 P1B26 Buick Code

1. What are the common symptoms of OBDII code P1B26 in a Buick Hybrid/Electric Vehicle?

The common symptoms include reduced electric vehicle range, poor fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B26 indicating Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage in a Buick?

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

3. How can I diagnose OBDII code P1B26 in my Buick Hybrid/Electric Vehicle?

Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the hybrid/electric vehicle battery system, and checking for any visible signs of damage or corrosion.

4. Can I still drive my Buick with OBDII code P1B26 present?

It is not recommended to drive your Buick with this code present, as it can lead to further damage to the hybrid/electric vehicle system and potentially leave you stranded.

5. What are some repair tips for resolving OBDII code P1B26 in a Buick Hybrid/Electric Vehicle?

Repair tips may include checking and cleaning battery connections, testing the battery voltage, resetting the system with a diagnostic tool, or seeking professional assistance for a thorough inspection.

6. How urgent is it to address OBDII code P1B26 in a Buick Hybrid/Electric Vehicle?

It is advisable to address this code promptly to prevent any potential damage to the hybrid/electric vehicle system and ensure the vehicle operates safely and efficiently.

7. Can OBDII code P1B26 be a false alarm in a Buick Hybrid/Electric Vehicle?

While false alarms are possible, it is crucial to investigate the code thoroughly to rule out any actual issues with the hybrid/electric vehicle battery system.

8. What are the long-term consequences of ignoring OBDII code P1B26 in a Buick Hybrid/Electric Vehicle?

Ignoring this code can lead to further battery degradation, decreased performance, and potential safety hazards while driving the vehicle.

9. Is it possible to reset OBDII code P1B26 in a Buick Hybrid/Electric Vehicle without professional help?

In some cases, you may be able to reset the code by disconnecting the battery for a few minutes, but it is recommended to have a professional diagnose and address the underlying issue.

10. How can regular maintenance help prevent OBDII code P1B26 from appearing in a Buick Hybrid/Electric Vehicle?

Regular maintenance, including checking the battery health, ensuring proper charging, and inspecting the electrical system, can help prevent issues that may trigger OBDII code P1B26.