U2608 GMC 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 GMC 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.
Code U2608 GMC Description
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.
What are the Possible Causes of the DTC U2608 GMC?
- 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 GMC?
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 GMC 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.
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Frequently Asked Questions about U2608 GMC Code
1. What are common symptoms of OBDII code U2608 in a GMC vehicle?
- Common symptoms include loss of communication between the electric A/C compressor control module and the hybrid/EV powertrain control module, resulting in issues with the A/C system operation.
2. What are possible causes of OBDII code U2608 in a GMC vehicle?
- Possible causes include damaged wiring or connectors, a faulty electric A/C compressor control module, a malfunctioning hybrid/EV powertrain control module, or issues with the communication network.
3. How serious is OBDII code U2608 in a GMC vehicle?
- While this code may not affect the drivability of the vehicle, it can impact the performance of the A/C system, especially in hybrid or electric vehicles where the A/C compressor is electrically driven.
4. How can I diagnose OBDII code U2608 in a GMC vehicle?
- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, checking the wiring and connectors for any damage, and testing the electric A/C compressor control module and hybrid/EV powertrain control module for proper function.
5. Can I continue driving with OBDII code U2608 in a GMC vehicle?
- It is generally safe to drive with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to ensure the proper functioning of the A/C system.
6. How can I repair OBDII code U2608 in a GMC vehicle?
- Repair options may include repairing or replacing damaged wiring or connectors, replacing the electric A/C compressor control module or hybrid/EV powertrain control module if faulty, and ensuring proper communication between the modules.
7. Are there any DIY tips for addressing OBDII code U2608 in a GMC vehicle?
- DIY tips may include checking for visible damage to wiring and connectors, ensuring proper connections, and consulting the vehicle's service manual for specific troubleshooting steps.
8. Can weather conditions affect OBDII code U2608 in a GMC vehicle?
- Extreme weather conditions such as heat or moisture can potentially impact the performance of the A/C system and communication between modules, leading to the triggering of this code.
9. How long does it typically take to repair OBDII code U2608 in a GMC vehicle?
- Repair times can vary depending on the specific cause of the issue and the availability of parts. It is recommended to consult with a professional mechanic for a more accurate estimate.
10. Is OBDII code U2608 a common issue in GMC vehicles?
- While not as common as other OBDII codes, U2608 can occur in GMC vehicles, especially in hybrid or electric models where communication between modules is critical for proper operation.
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