AutoCodes – Generic – U2609

U2609 Code - Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain Control Module 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: U2609 indicates Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module.
Common causes: Common causes include Faulty Hybrid/EV Powertrain Control Module, Hybrid/EV Powertrain Control Module harness is open or shorted, Hybrid/EV Powertrain Control Module 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 1,263

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 U2609 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.
This diagnostic is used to check the loss of communication with the Hybrid/EV Powertrain Control Module on a high-speed General Motors Local Area Network (GMLAN) bus. The Battery Energy Control Module supervises a periodic serial data message to check the communication status of the Hybrid/EV Powertrain Control Module. If this message is not received within 400 ms, the Battery Energy Control Module increases its fail count. When this fail count is over X Cal Value (7) during Y Cal Value (10 samples), the diagnostic status of this code is set to Failed and transmitted over high voltage energy high-speed GMLAN bus to the Hybrid/EV Powertrain Control Module.
The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received within 400 ms.

OBDII Code U2609 - Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module - AutoCodes.com — U2609 Code - Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U2609?

Faulty Hybrid/EV Powertrain Control Module
Hybrid/EV Powertrain Control Module harness is open or shorted
Hybrid/EV Powertrain Control Module circuit poor electrical connection
Faulty Battery Charger Control Module

How to Fix the DTC U2609?

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 U2609 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 U2609 code?

Need more information on how to fix the U2609 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2609 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2609 Buick — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2609 Cadillac — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2609 Chevrolet — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2609 GMC — Battery Charger Control Module Lost Communication With Hybrid/EV Powertrain Control Module

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 U2609 Code

1. What are common symptoms of OBDII code U2609?

- Common symptoms include the battery not charging properly, inability to start the vehicle, and dashboard warning lights related to the hybrid or EV system.

2. What can cause the OBDII code U2609 to occur?

- This code typically occurs when there is a communication issue between the Battery Charger Control Module and the Hybrid/EV Powertrain Control Module.

3. How can I diagnose the source of the communication problem for code U2609?

- Diagnosing the issue may involve checking the wiring connections between the modules, inspecting for any damaged wires, and using a diagnostic scanner to retrieve more specific error codes.

4. Are there any common repair tips for resolving code U2609?

- Some common repair tips include checking and repairing any damaged wiring connections, resetting the system by disconnecting the battery, and reprogramming the modules if necessary.

5. Can a DIY enthusiast fix the U2609 code issue at home?

- While some basic checks and repairs can be done by DIY enthusiasts, resolving communication issues between control modules may require specialized tools and expertise, so professional help is recommended.

6. Is it safe to continue driving with the U2609 code present?

- It is not recommended to continue driving with the U2609 code present, as it can lead to further damage to the hybrid or EV system and potentially cause the vehicle to malfunction.

7. How much does it cost to repair the U2609 code?

- The cost of repairing the U2609 code can vary depending on the extent of the issue, the need for replacement parts, and whether professional diagnostic services are required. Costs can range from a few hundred to over a thousand dollars.

8. Can a low battery cause the U2609 code to trigger?

- A low battery can sometimes contribute to communication issues between control modules, potentially leading to the U2609 code being triggered. Ensuring the battery is in good condition is important for overall system health.

9. Are there any preventive measures to avoid the U2609 code in the future?

- Regular maintenance checks, ensuring proper battery health, and addressing any warning lights or issues promptly can help prevent communication problems that may trigger the U2609 code.

10. Will resetting the fault codes make the U2609 code disappear permanently?

- Resetting the fault codes may temporarily clear the U2609 code, but if the underlying communication issue between modules is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause.