AutoCodes – Cadillac – P1B26 Cadillac

P1B26 Cadillac 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 Cadillac 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 787

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 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 P1B26 Cadillac - Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage - AutoCodes.com — P1B26 Cadillac Code - Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B26 Cadillac?

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

How to Fix the DTC P1B26 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 P1B26 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 P1B26 Cadillac Code

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

- Common symptoms include reduced battery performance, difficulty starting the vehicle, and potential illumination of the check engine light.

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

- Causes may include a faulty battery pack, issues with the battery management system, loose or corroded connections, or a problem with the charging system.

3. How can I diagnose OBDII code P1B26 on my Cadillac Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to read the code, checking the battery voltage levels, inspecting battery connections, and performing a thorough inspection of the hybrid/electric system.

4. Is it safe to continue driving with OBDII code P1B26 present on my Cadillac Hybrid/Electric Vehicle?

- It is not recommended to continue driving with this code as it can lead to further damage to the battery system and potentially affect the vehicle's overall performance.

5. What are some repair tips for addressing OBDII code P1B26 on a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking and tightening battery connections, inspecting the battery pack for any visible damage, and consulting a professional technician for a complete diagnosis and repair.

6. Can a DIY enthusiast fix OBDII code P1B26 on a Cadillac Hybrid/Electric Vehicle?

- While some basic checks like inspecting connections can be done by a DIY enthusiast, diagnosing and repairing issues related to the hybrid/electric system should be left to experienced professionals.

7. How much does it typically cost to repair OBDII code P1B26 on a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to budget for diagnostic fees, potential parts replacement, and labor costs which can range from a few hundred to over a thousand dollars.

8. Can resetting the OBDII code P1B26 on a Cadillac Hybrid/Electric Vehicle resolve the issue?

- Simply resetting the code without addressing the underlying problem is unlikely to resolve the issue permanently. It is crucial to diagnose and repair the root cause of the code to prevent it from reoccurring.

9. Are there any preventive maintenance steps to avoid OBDII code P1B26 on a Cadillac Hybrid/Electric Vehicle?

- Regularly checking the battery system, ensuring proper charging, and following the manufacturer's maintenance schedule can help prevent issues that may trigger code P1B26.

10. Is it necessary to visit a dealership for OBDII code P1B26 diagnosis and repair on a Cadillac Hybrid/Electric Vehicle?

- While dealerships have specialized knowledge and tools for hybrid/electric vehicle systems, independent repair shops with experience in these systems can also effectively diagnose and repair OBDII code P1B26.