engine light on and 2 codes, what do they mean?

Hi i have a 2003 chrysler sebring and i get two codes:

P1681 : No I/P Cluster CCD/ J1850 Messages received

P1604 : pcm Internal Dual-Port RAM Read/Write Integrity Failure

what do those means? are they vitals? do i need to take my car in and get it fixed?

let me know,

thomas

the first one is

P1681 - No messages received from the cluster control module (dashboard computer)

I am not familar with the second one. Go to autozone and they should scan your car for free and run them thru the computer. A mechanic will probly charge you for it though.