I'm not sure if it will work for your radio buy try this:
1 turn ignition on and radio power on
2 press and hold presets 2 and 3 for about 10 seconds until 3 digits
are displayed. write numbers down.
3 press am/fm button with first 3 digits displayed and write down second set of 3 digits.
4 Send me these number and I'll try to get the secret code. I'll need your car model and year.