AutoCodes – Generic – U2608

U2608 Code - Electric A/C Compressor 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: U2608 indicates Electric A/C Compressor 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 1,390

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 U2608 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 U2608 - Electric A/C Compressor Control Module Lost Communication With Hybrid/EV Powertrain Control Module - AutoCodes.com — U2608 Code - Electric A/C Compressor Control Module Lost Communication With Hybrid/EV Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U2608?

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 Electric A/C Compressor Control Module

How to Fix the DTC U2608?

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 U2608 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 U2608 code?

Need more information on how to fix the U2608 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2608 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2608 Buick — Electric A/C Compressor Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2608 Cadillac — Electric A/C Compressor Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2608 Chevrolet — Electric A/C Compressor Control Module Lost Communication With Hybrid/EV Powertrain Control Module
U2608 GMC — Electric A/C Compressor 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 U2608 Code

1. What are the common symptoms of OBDII code U2608?

- Common symptoms include the electric A/C compressor not working, lack of cool air from the A/C system, and potential issues with the hybrid/EV powertrain operation.

2. What can cause the OBDII code U2608 to trigger?

- This code is triggered when the electric A/C compressor control module loses communication with the hybrid/EV powertrain control module. Possible causes can include wiring issues, faulty modules, or software glitches.

3. How can I diagnose the OBDII code U2608?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking the wiring between the modules, and testing the modules themselves for functionality.

4. Can I still drive my vehicle with the OBDII code U2608 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper operation of the A/C system and potentially impact the hybrid/EV powertrain performance.

5. How can I repair OBDII code U2608?

- Repair options include checking and repairing any damaged wiring, replacing faulty modules, updating software if necessary, and clearing the code with a diagnostic scanner.

6. Is it possible to prevent OBDII code U2608 from occurring?

- Regular maintenance, such as checking the A/C system and hybrid/EV components, can help prevent issues that may lead to this code. Ensuring proper electrical connections and software updates can also help prevent communication errors.

7. Can a DIY enthusiast address OBDII code U2608 on their own?

- While some basic troubleshooting steps can be taken by DIY enthusiasts, diagnosing and repairing this code may require specialized tools and knowledge. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. Will OBDII code U2608 affect the overall performance of the vehicle?

- Yes, this code can impact the overall performance of the vehicle by affecting the A/C system operation and potentially interfering with the hybrid/EV powertrain functionality.

9. How urgent is it to address OBDII code U2608?

- It is recommended to address this code promptly to avoid any further issues with the A/C system and the hybrid/EV powertrain. Ignoring the code may lead to additional problems and potential damage.

10. Is OBDII code U2608 a common issue in hybrid or electric vehicles?

- This code is more common in hybrid or electric vehicles equipped with electric A/C compressors. However, it is not a widespread issue and can often be resolved with proper diagnosis and repairs.