AutoCodes – Buick – U2620 Buick

U2620 Buick Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 8

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 8, Hybrid/EV Battery Interface Control Module 8 harness is open or shorted, Hybrid/EV Battery Interface Control Module 8 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: U2620 Buick indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 8.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 8, Hybrid/EV Battery Interface Control Module 8 harness is open or shorted, Hybrid/EV Battery Interface Control Module 8 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 482

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U2620 Buick 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 8 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 8 to Battery Energy Control Module within 4s.

OBDII Code U2620 Buick - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 8 - AutoCodes.com — U2620 Buick Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 8

What does this mean?

What are the Possible Causes of the DTC U2620 Buick?

Faulty Hybrid/EV Battery Interface Control Module 8
Hybrid/EV Battery Interface Control Module 8 harness is open or shorted
Hybrid/EV Battery Interface Control Module 8 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2620 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 U2620 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.

Need more information about the U2620 Buick code?

Need more information on how to fix the U2620 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2620 Buick code diagnosed by a professional: Find a repair shop in your area

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 U2620 Buick Code

1. What are the common symptoms of OBDII code U2620 in a Buick related to battery energy control module communication loss?

- Common symptoms include loss of power or acceleration in the vehicle, warning lights on the dashboard, and potential issues with hybrid or electric battery functionality.

2. What are the potential causes of OBDII code U2620 in a Buick indicating a communication problem between the battery energy control module and the hybrid/EV battery interface control module 8?

- Possible causes include a faulty battery energy control module, issues with the hybrid/EV battery interface control module 8, damaged wiring or connectors, or a communication network error within the vehicle's system.

3. How can I diagnose OBDII code U2620 in my Buick indicating a loss of communication with the hybrid/EV battery interface control module 8?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, checking the wiring and connectors for any damage, and performing a thorough inspection of the battery energy control module and the hybrid/EV battery interface control module 8.

4. Are there any repair tips for resolving OBDII code U2620 in a Buick related to the battery energy control module losing communication with the hybrid/EV battery interface control module 8?

- Repair tips may include checking and repairing any damaged wiring or connectors, resetting the fault codes after fixing the issue, and ensuring proper communication between the modules through reprogramming or reconfiguration.

5. Can OBDII code U2620 in a Buick be fixed without professional help?

- While some basic checks and repairs can be done by car owners, resolving communication issues between complex modules like the battery energy control module and the hybrid/EV battery interface control module 8 may require professional diagnostic equipment and expertise.

6. Is it safe to continue driving my Buick with OBDII code U2620 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage or safety hazards related to the hybrid or electric battery systems.

7. How much does it typically cost to repair OBDII code U2620 in a Buick at a dealership or repair shop?

- Repair costs can vary depending on the exact cause of the communication issue, but they may range from a few hundred to over a thousand dollars, considering parts and labor expenses.

8. Can a software update fix the communication problem related to OBDII code U2620 in a Buick?

- In some cases, a software update or reprogramming of the modules may resolve the communication issue, especially if it is related to compatibility or configuration errors.

9. Are there any recalls or technical service bulletins related to OBDII code U2620 in Buick vehicles?

- It is recommended to check with the manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies available.

10. How can regular maintenance help prevent OBDII code U2620 from occurring in a Buick?

- Regular maintenance, including checking the battery systems, keeping connectors clean and secure, and following recommended service intervals, can help prevent communication issues and potential fault codes like U2620 from arising in your Buick.