AutoCodes – Generic – U2623

U2623 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Battery Interface Control Module 11, Hybrid/EV Battery Interface Control Module 11 harness is open or shorted, Hybrid/EV Battery Interface Control Module 11 circuit poor electrical connection. 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: U2623 indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 11, Hybrid/EV Battery Interface Control Module 11 harness is open or shorted, Hybrid/EV Battery Interface Control Module 11 circuit poor electrical connection.
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 1,984

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 Jun 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2623 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.
The scan tool does not communicate the Hybrid/EV Battery Interface Control Modules 11 on Battery Energy Control Module dedicated bus.
The Diagnostic Trouble Code (DTC) will set when there is no temperature report message from Hybrid/EV Battery Interface Control Modules 11 to Battery Energy Control Module within 4s.

OBDII Code U2623 - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11 - AutoCodes.com — U2623 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11

What does this mean?

What are the Possible Causes of the DTC U2623?

Faulty Hybrid/EV Battery Interface Control Module 11
Hybrid/EV Battery Interface Control Module 11 harness is open or shorted
Hybrid/EV Battery Interface Control Module 11 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2623?

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 U2623 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 U2623 code?

Need more information on how to fix the U2623 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2623 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2623 Buick — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11
U2623 Cadillac — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11
U2623 Chevrolet — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11
U2623 GMC — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 11

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 U2623 Code

1. What are the common symptoms of OBDII code U2623?

- Common symptoms include the check engine light coming on, decreased fuel efficiency, and potential drivability issues.

2. What does OBDII code U2623 indicate?

- This code indicates that the Battery Energy Control Module has lost communication with the Hybrid/EV Battery Interface Control Module 11.

3. What are the possible causes of code U2623?

- Possible causes include wiring issues, loose connections, a faulty control module, or problems with the hybrid/EV battery interface.

4. How can I diagnose OBDII code U2623?

- Diagnosis typically involves checking the wiring and connections between the control modules, testing the modules for functionality, and using a diagnostic scan tool to retrieve specific error codes.

5. Can I still drive my vehicle with code U2623 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further issues with the hybrid or electric components of the vehicle.

6. How can I repair OBDII code U2623?

- Repairing this code may involve fixing wiring issues, ensuring proper connections, replacing a faulty control module, or addressing problems with the hybrid/EV battery interface.

7. Is it safe to reset the code and continue driving?

- It is not advisable to simply reset the code without addressing the underlying issue, as it may lead to further complications or potentially dangerous situations.

8. How much does it typically cost to repair OBDII code U2623?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve labor costs for diagnosis and repair, as well as potential replacement parts.

9. Can code U2623 be triggered by a weak battery?

- A weak battery could potentially contribute to communication issues between control modules, but it is not a common direct cause of OBDII code U2623.

10. Are there any preventive measures to avoid code U2623 in the future?

- Regular maintenance, including checking for loose connections and ensuring the health of the hybrid/EV components, can help prevent issues that may trigger code U2623.