U2611 Chevrolet Code - Auxiliary Transmission Fluid Pump 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 Auxiliary Transmission Fluid Pump Control Module, Auxiliary Transmission Fluid Pump Control Module harness is open or shorted, Auxiliary Transmission Fluid Pump 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
- U2611 Chevrolet indicates Auxiliary Transmission Fluid Pump Control Module Lost Communication With Hybrid/EV Powertrain Control Module.
- Common causes
- Common causes include Faulty Auxiliary Transmission Fluid Pump Control Module, Auxiliary Transmission Fluid Pump Control Module harness is open or shorted, Auxiliary Transmission Fluid Pump 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 U2611 Chevrolet 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 U2611 Chevrolet?
- Faulty Auxiliary Transmission Fluid Pump Control Module
- Auxiliary Transmission Fluid Pump Control Module harness is open or shorted
- Auxiliary Transmission Fluid Pump Control Module circuit poor electrical connection
- Faulty Hybrid/EV Powertrain Control Module
How to Fix the DTC U2611 Chevrolet?
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 U2611 Chevrolet 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 U2611 Chevrolet code?
Need more information on how to fix the U2611 Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U2611 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U2611 Chevrolet Code
1. What does the OBDII code U2611 mean on a Chevrolet vehicle?
U2611 indicates that the Auxiliary Transmission Fluid Pump Control Module has lost communication with the Hybrid/EV Powertrain Control Module.
2. What are common symptoms of the U2611 code?
Symptoms may include the hybrid or EV system not functioning properly, illuminated warning lights (such as the MIL or hybrid system warning), reduced power, or unusual transmission behavior.
3. What causes the U2611 code to appear?
Common causes include a faulty Auxiliary Transmission Fluid Pump Control Module, wiring issues like damaged or corroded connectors, software glitches, or communication faults in the CAN bus network.
4. Can I drive my Chevrolet with the U2611 code active?
Driving with this code is not recommended as it may lead to transmission overheating or reduced hybrid/EV performance, potentially causing further damage.
5. How do I diagnose the U2611 code on a Chevrolet?
Diagnosing involves scanning the vehicle with an advanced OBDII tool, inspecting wiring and connectors between the modules, and checking for other related codes that might indicate broader communication issues.
6. How do I fix the U2611 code?
Repairs may include replacing or reprogramming the Auxiliary Transmission Fluid Pump Control Module, repairing damaged wiring, cleaning corroded connectors, or addressing faults in the CAN bus system.
7. How much does it cost to repair the U2611 code on a Chevrolet?
Repair costs can vary widely but typically range from $150 to $500, depending on whether the issue is related to wiring repairs, module replacement, or reprogramming.
8. Can a software update resolve the U2611 code?
Yes, in some cases, a software update for the involved modules may resolve communication issues and clear the U2611 code.
9. What tools are needed to troubleshoot the U2611 code?
You’ll need a professional-grade OBDII scanner capable of reading manufacturer-specific codes, a multimeter for testing wiring, and potentially access to GM-specific diagnostic software.
10. Could a bad battery cause the U2611 code?
Yes, a weak or failing 12V battery in hybrid/EV vehicles can cause communication errors like U2611, as proper voltage is required for module operation.
Discuss the causes and fixes for U2611 Chevrolet OBDII Code
Code U2611 Chevrolet comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
