Polk Mono UM1 Installation And Operation Manual page 20

On-Screen Display Advisory Message
Chan Locked Channel Locked
Enter Code:_ _ _ _ Enter Lock Code
Wrong Code Invalid Lock Code
Advisory Messages Reported by the SiriusXM Vehicle Tuner (Continued)
Cause
The channel that you have requested is Locked by the radio Parental
Control feature.
User prompted to enter the lock/unlock code.
The unlock code entered by the user is incorrect.
See the section on Parental Control, page 15 for more information on
the Parental Control feature and how to access locked channels.
Enter the four digit code to unlock the channel.

Input the correct four digit code to unlock the channel.

Reset lock code to default following instructions on page 14.
18
UM1
Explanation/Solution