codes 0181,0497

Can someone please translate thouroughly? 0181 is fuel temp. sens. or something and the 0497 I could'nt even find. It's running great by the way.I put on a new EGR a month ago but not the DPSF sens.I think that's how you spell it,don't have time to look it up.I've gotten the 181 before,where do I start looking? thanks