AutoCodes – GMC – P1B26 GMC

P1B26 GMC 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 GMC 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 818

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

What does this mean?

What are the Possible Causes of the DTC P1B26 GMC?

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

How to Fix the DTC P1B26 GMC?

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 GMC 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 GMC Code

1. What are the common symptoms of OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage)?

- Common symptoms include a decrease in hybrid/electric vehicle performance, reduced fuel efficiency, and potential issues with starting the vehicle.

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

- Possible causes may include a faulty hybrid/electric vehicle battery, issues with the battery management system, poor electrical connections, or wiring problems.

3. How can I diagnose OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage)?

- Diagnosis typically involves using a scan tool to read the fault code, inspecting the hybrid/electric vehicle battery and related components, and testing the electrical connections for proper voltage.

4. Can I drive my vehicle with OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage) present?

- It is not recommended to drive your vehicle with this fault code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

5. What repairs may be needed to fix OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage)?

- Repairs may involve replacing the hybrid/electric vehicle battery, repairing or replacing faulty wiring or connectors, resetting the battery management system, or addressing any underlying issues causing the low voltage condition.

6. Are there any DIY tips for addressing OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage)?

- DIY tips may include checking and tightening electrical connections, inspecting the battery for visible damage, and ensuring the battery cooling system is functioning properly. However, complex repairs may require professional assistance.

7. How much does it cost to repair OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage)?

- The cost of repairs can vary depending on the specific issue causing the fault code, the extent of the damage, and whether parts need to be replaced. It's best to consult a professional for an accurate estimate.

8. Can a low voltage condition in the hybrid/electric vehicle battery cause other problems besides triggering OBDII code P1B26 GMC?

- Yes, a low voltage condition can lead to various other electrical and performance issues in the vehicle, such as problems with the charging system, drivability issues, and potential damage to other components.

9. Is it safe to attempt to reset the fault code associated with OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage) on my own?

- While you can attempt to clear the fault code using a scan tool, it's important to address the underlying issue causing the low voltage condition first to prevent the code from reoccurring. If you're unsure, it's best to seek professional help.

10. What should I do if OBDII code P1B26 GMC (Hybrid/Electric Vehicle Battery 32 Circuit Low Voltage) keeps coming back after repairs?

- If the fault code persists after repairs, it may indicate an ongoing issue with the hybrid/electric vehicle battery system. In this case, a thorough diagnosis by a qualified technician is recommended to identify and address the root cause.