U2141 – Lost Communication with Module

The ODBII code U2141 indicates that there is a loss of communication with a specific module in the vehicle’s network, suggesting that the module is not responding or is unable to communicate with other modules.

The severity of ODBII code U2141 is moderate.

Common Causes For: U2140 U2140: “Module Communication Loss Detected”

• Faulty wiring or connectors
• Failed module
• Corroded connectors
• Shorted or open circuits
• Power supply issues
• Grounding problems
• Software or firmware issues
• Intermittent communication faults
• Damaged or malfunctioning CAN bus
• Electrical interference

Common misdiagnosis for U2141 U2141: “Lost Communication with Module”

• Faulty wiring or connectors
• Defective control module
• Software issues or updates needed
• Battery or power supply problems
• Grounding issues
• Intermittent faults in communication lines
• Other unrelated module failures

Common Troubleshooting Steps

The OBD-II code U2141 indicates a “Lost Communication with Module,” which typically means that the vehicle’s onboard diagnostic system is unable to communicate with a specific module (such as a control unit) in the vehicle’s network. This can be caused by various issues, including wiring problems, module failures, or communication network issues. Here are some common troubleshooting steps to diagnose and resolve the U2141 code:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context about the issue.
• Inspect the Wiring and Connectors: Visually inspect the wiring and connectors associated with the module that is reporting the U2141 code. Look for:
• Damaged or frayed wires
• Corroded or loose connectors
• Poor ground connections
• Check the Module: If the wiring and connectors appear to be in good condition, the next step is to check the module itself:
• Ensure that the module is properly secured and connected.
• If possible, test the module in another vehicle to see if it functions correctly.
• Test the Communication Network: Use a scan tool to check the communication network (CAN bus) for proper operation:
• Look for voltage levels on the communication lines.
• Check for short circuits or open circuits in the network.
• Use a multimeter to measure resistance and continuity in the communication lines.
• Check for Power and Ground: Verify that the module has the necessary power and ground connections:
• Use a multimeter to check for voltage at the module’s power supply pins.
• Ensure that the ground connections are solid and free of corrosion.
• Perform a Hard Reset: Disconnect the vehicle’s battery for a few minutes to reset the modules. Reconnect the battery and see if the code reappears.
• Update or Reprogram the Module: If the module is functioning but still not communicating, it may require a software update or reprogramming. Check with the manufacturer for any available updates.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the specific vehicle make and model. Manufacturers may have issued guidance on common issues related to communication problems.
• Seek Professional Help: If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to address complex communication issues.Conclusion Troubleshooting a U2141 code can be complex, as it may involve multiple systems and components. Following these steps systematically can help identify the root cause of the communication loss and lead to an effective resolution.