Hi there,
I found the following information on Page 28 of the Pioneer manual for your DEH-P2900MP through the pioneer website:
http://www.pioneerelectronics.com/pio/pe/images/portal/cit_11221/370967683DEHP2900MPOperationManual1027.pdf-----------------------------------------------------
ERROR-11, 12,
17, 30
Dirty disc Clean disc.
ERROR-11, 12,
17, 30
Scratched disc Replace disc.
ERROR-10, 11,
12, 15, 17, 30,
A0
Electrical or me-
chanical
Turn the ignition
ON and OFF, or
switch to a differ-
ent source, then
back to the CD
player.
-----------------------------------
I hope that helps
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