Communication with the radio/infotainment system has been lost.
Informational only. Consult a qualified mechanic.
Try disconnecting battery for 10 minutes. If it persists, have the head unit inspected.
The U0184 OBD-II diagnostic trouble code (DTC) indicates: lost communication with radio/entertainment. This is a low-severity network code that your vehicle's onboard diagnostics system triggers when communication with the radio/infotainment system has been lost. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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