AutoCodes – GMC – P1B23 GMC

P1B23 GMC Code - Hybrid/Electric Vehicle Battery 31 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: P1B23 GMC indicates Hybrid/Electric Vehicle Battery 31 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 869

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 P1B23 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 P1B23 GMC - Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage - AutoCodes.com — P1B23 GMC Code - Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B23 GMC?

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

How to Fix the DTC P1B23 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 P1B23 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 P1B23 GMC Code

1. What are the common symptoms of OBDII code P1B23 GMC related to the Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- Common symptoms may include poor hybrid system performance, reduced fuel efficiency, and potential inability to start the vehicle.

2. What are the possible causes of OBDII code P1B23 GMC indicating Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- The code may be triggered by issues such as a weak or failing hybrid/electric vehicle battery, faulty battery management system, or wiring/connectivity problems.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage issue associated with OBDII code P1B23 GMC?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the battery voltage levels, inspecting the battery connections, and testing the battery management system.

4. Is it safe to continue driving with OBDII code P1B23 GMC pointing to Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/electric system and potentially cause the vehicle to stop running.

5. How can I repair OBDII code P1B23 GMC indicating Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- Repairs may involve replacing the hybrid/electric vehicle battery, repairing or replacing damaged wiring, resetting the battery management system, or seeking professional assistance from a qualified technician.

6. Can a DIY enthusiast fix OBDII code P1B23 GMC related to Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, dealing with high-voltage hybrid/electric systems requires specialized knowledge and tools, so it is advisable to seek professional help.

7. Are there any preventive maintenance tips to avoid encountering OBDII code P1B23 GMC for Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- Regularly monitoring the hybrid/electric vehicle battery health, keeping the connections clean and secure, and following manufacturer-recommended maintenance schedules can help prevent this issue.

8. Can extreme weather conditions contribute to triggering OBDII code P1B23 GMC for Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage?

- Yes, extreme temperatures, both hot and cold, can impact the performance and health of the hybrid/electric vehicle battery, potentially leading to low voltage issues and triggering the code.

9. Will resetting the OBDII code P1B23 GMC resolve the Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage problem?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the low voltage condition in the hybrid/electric battery.

10. How crucial is it to address OBDII code P1B23 GMC concerning Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage promptly?

- It is essential to address this code promptly to prevent further damage to the hybrid/electric system, ensure the vehicle's safe operation, and maintain optimal fuel efficiency.