U2019 – Audio Voice Module Not Responding

The ODBII code U2019 indicates that the audio voice module is not responding to communication requests from the vehicle’s network, suggesting a potential issue with the module itself or its connections.

The severity of ODBII code U2019 is generally considered moderate.

Common Causes For: U2018 Passenger Side Crash Sensor Communication Fault (Non SCP)

• Faulty audio voice module
• Wiring issues or damaged connectors
• Corrupted software or firmware in the audio system
• Poor ground connection
• Communication network issues (CAN bus problems)
• Faulty control module
• Low battery voltage or power supply issues

Common misdiagnosis for U2019 Audio Voice Module Not Responding

• Faulty audio system
• Wiring issues
• Faulty amplifier
• Defective speakers
• Malfunctioning head unit
• Software glitches
• Battery or power supply problems
• Communication issues with other modules

Common Troubleshooting Steps

The OBD-II code U2019 indicates that there is a communication issue with the Audio Voice Module (AVM) in the vehicle. This code typically suggests that the module is not responding to requests from the vehicle’s network. Here are some common troubleshooting steps to diagnose and potentially resolve the issue:

• Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, multiple codes can provide more context for the issue.
• Inspect Wiring and Connectors:
• Check the wiring harness and connectors associated with the Audio Voice Module for any signs of damage, corrosion, or loose connections.
• Ensure that all connectors are securely plugged in.
• Verify Power and Ground:
• Use a multimeter to check that the Audio Voice Module is receiving the correct voltage and that the ground connection is solid.
• If there is no power or ground, trace the wiring back to the source to identify any breaks or shorts.
• Check for Communication Issues:
• Use a scan tool to monitor the communication lines (CAN bus) for any abnormalities.
• Ensure that other modules in the network are functioning properly, as a fault in one module can affect communication with others.
• Inspect the Audio Voice Module:
• If possible, remove the Audio Voice Module and inspect it for physical damage.
• If you have access to a known good module, consider swapping it out to see if the issue persists.
• Reset the Module:
• Sometimes, simply disconnecting the battery for a few minutes can reset the modules and clear temporary communication issues.
• After reconnecting, check if the code reappears.
• Software Updates:
• Check if there are any software updates available for the vehicle’s modules. Sometimes, manufacturers release updates to fix known issues.
• Consult Technical Service Bulletins (TSBs):
• Look for any TSBs related to the Audio Voice Module or communication issues for your specific vehicle make and model. Manufacturers may have specific fixes for known problems.
• Professional Diagnosis:
• If the issue persists after performing the above steps, it may be necessary to take the vehicle to a professional technician or dealership for further diagnosis. They may have specialized tools and knowledge to address complex communication issues. By following these steps, you can systematically identify and potentially resolve the issue related to the U2019 code.