AutoCodes – Generic – U2605

U2605 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3

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 3, Hybrid/EV Battery Interface Control Module 3 harness is open or shorted, Hybrid/EV Battery Interface Control Module 3 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: U2605 indicates Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module 3, Hybrid/EV Battery Interface Control Module 3 harness is open or shorted, Hybrid/EV Battery Interface Control Module 3 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 1,468

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 U2605 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 3 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 3 to Battery Energy Control Module within 4s.

OBDII Code U2605 - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3 - AutoCodes.com — U2605 Code - Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3

What does this mean?

What are the Possible Causes of the DTC U2605?

Faulty Hybrid/EV Battery Interface Control Module 3
Hybrid/EV Battery Interface Control Module 3 harness is open or shorted
Hybrid/EV Battery Interface Control Module 3 circuit poor electrical connection
Faulty Battery Energy Control Module

How to Fix the DTC U2605?

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 U2605 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 U2605 code?

Need more information on how to fix the U2605 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2605 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2605 Buick — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3
U2605 Cadillac — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3
U2605 Chevrolet — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3
U2605 GMC — Battery Energy Control Module Lost Communication With Hybrid/EV Battery Interface Control Module 3

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 U2605 Code

1. What are the common symptoms of OBDII code U2605?

The common symptoms of code U2605 may include the hybrid/EV system not operating correctly, poor fuel efficiency, warning lights on the dashboard, and the vehicle going into a reduced power mode.

2. What causes OBDII code U2605 to appear?

Code U2605 usually appears when there is a communication breakdown between the Battery Energy Control Module and the Hybrid/EV Battery Interface Control Module 3. This can be caused by wiring issues, a faulty control module, or a software glitch.

3. How serious is OBDII code U2605?

Code U2605 should be addressed promptly to avoid potential issues with the hybrid/EV system's performance and overall drivability. Ignoring this code may lead to further complications and potentially leave you stranded.

4. Can I still drive my vehicle with OBDII code U2605 present?

It is not recommended to drive your vehicle with code U2605 present, as it can affect the hybrid/EV system's operation and possibly lead to further damage. It's best to have the issue diagnosed and repaired by a qualified technician.

5. How can I diagnose OBDII code U2605?

Diagnosing code U2605 requires specialized diagnostic equipment to communicate with the control modules involved. A technician will perform a thorough inspection of the wiring, connectors, and modules to pinpoint the communication issue.

6. What are some repair tips for resolving OBDII code U2605?

Repair tips for resolving code U2605 may include checking and repairing any damaged wiring, ensuring proper connections between modules, updating software as needed, and replacing any faulty control modules.

7. Can a DIY enthusiast fix OBDII code U2605?

Due to the complexity of hybrid/EV systems and the specialized equipment needed for diagnosis, it is not recommended for DIY enthusiasts to attempt fixing code U2605. It's best to seek assistance from a qualified technician.

8. How much does it cost to repair OBDII code U2605?

The cost of repairing code U2605 can vary depending on the underlying cause of the communication issue. It is advisable to get a diagnosis from a technician to determine the exact repair cost.

9. How long does it typically take to repair OBDII code U2605?

The repair time for code U2605 can vary based on the diagnosis results and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues may take longer to resolve.

10. Can resetting the OBDII codes clear U2605?

While resetting the OBDII codes may temporarily clear U2605, the underlying issue causing the code will still need to be addressed to prevent it from reoccurring. Resetting the codes without proper diagnosis and repair is not a permanent solution.