AutoCodes – Generic – U2606

U2606 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4

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 4, Hybrid/EV Battery Interface Control Module 4 harness is open or shorted, Hybrid/EV Battery Interface Control Module 4 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: U2606 indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 4, Hybrid/EV Battery Interface Control Module 4 harness is open or shorted, Hybrid/EV Battery Interface Control Module 4 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 1,230

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 U2606 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 4 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 4 to Battery Energy Control Module within 4s.

OBDII Code U2606 - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4 - AutoCodes.com — U2606 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4

What does this mean?

What are the Possible Causes of the DTC U2606?

Faulty Hybrid/EV Battery Interface Control Module 4
Hybrid/EV Battery Interface Control Module 4 harness is open or shorted
Hybrid/EV Battery Interface Control Module 4 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2606?

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 U2606 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 U2606 code?

Need more information on how to fix the U2606 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2606 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2606 Buick — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4
U2606 Cadillac — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4
U2606 Chevrolet — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4
U2606 GMC — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 4

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 U2606 Code

1. What are the common symptoms of OBDII code U2606?

- Common symptoms include the hybrid/EV vehicle not starting, loss of power, poor fuel efficiency, and warning lights on the dashboard related to the battery system.

2. What could cause the Battery Energy Control Module to lose communication with the Hybrid/EV Battery Interface Control Module 4?

- Possible causes include loose or damaged wiring connections, a faulty control module, software issues, or a problem with the hybrid/EV battery itself.

3. How can I diagnose the issue related to code U2606?

- Diagnosing the issue may require a professional scan tool to retrieve the specific codes and data related to the communication loss between the modules. Checking the wiring connections and conducting a thorough inspection of the battery system may also be necessary.

4. What is the recommended repair for OBDII code U2606?

- The repair process may involve addressing any wiring issues, replacing the faulty control module, updating software if needed, or repairing/replacing components of the hybrid/EV battery system that are causing the communication error.

5. Can I drive my vehicle with code U2606 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further issues with the hybrid/EV system and potentially cause safety concerns. It's best to address the problem promptly.

6. Is it possible to reset the code U2606 without fixing the underlying issue?

- While clearing the code temporarily may make warning lights disappear, the underlying problem causing the communication loss will persist. It's crucial to address the root cause to prevent further issues.

7. How much does it typically cost to repair OBDII code U2606?

- Repair costs can vary depending on the exact cause of the communication loss and the extent of the repairs needed. Costs may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix code U2606 at home?

- While diagnosing and fixing wiring issues may be within reach for some DIY enthusiasts, addressing more complex problems with the control modules or battery system may require specialized knowledge and tools best handled by a professional.

9. Are there any preventive maintenance tips to avoid code U2606 in the future?

- Regularly checking the condition of the battery system, keeping wiring connections secure, and following the manufacturer's recommended maintenance schedule for the hybrid/EV components can help prevent issues leading to code U2606.

10. Will code U2606 cause permanent damage to my hybrid/EV vehicle if left unresolved?

- Ignoring code U2606 can lead to further damage to the battery system and other components, potentially resulting in more costly repairs down the line. It's important to address the issue promptly to avoid long-term damage.