Hi,
Nearly missed your post in the sea of new corolla post !
Not a function I have used, generally just use the Travel Report button
From the manual - when tuned in to a RDS station ( about all FM ones as I understand things) you press the PTY program and it should then display NEWS, then SPORTS,TALK, POP, CLASSICS for each subsequent press of PTY.
If nothing found it displays NO PTY
If you do the above and have say SPORTS displayed, pressing the SEEK UP or DOWN button, it will " Search a Station that carries the PTY code"
So it would seem it then searches the full fm band for any station with a matching PTY.
If it does not, it will display NOTHING and then return you to your original program
hth