Hi guys new to hondas and have a few questions

Ive recently purchased a 2000 honda accord coupe LX with a 3.0 and aftermarket AEM dryflow intake. it came with all of this and the day i bought it. it seemed to drive fine and the whole first week afterward. as of lately it will die while idling at stop lights and sometime whilst driving. if you drop it in nuetral and try to pedal it a little it sounds as though its just bogging down entirely. mind you its an auto so its not like im shifting it and causing it to die down. ive run the codes and so far the 3 codes ive had show are

P0705 trans range sensor circuit malfunction (position #2)

P0401 exhaust gas recirculatoin flow insufficient
and
P1456 evap emission control system leak near gas tank

the EGR looks as though it was recently replaced but it may be clogged. how can i clean it?

and im sur one of the evap lines is just dry rotted or something causing it to throw the code

Has anyone else had a similar set of problems occur with their accord? any and all help is appreciated

 

http://www.hondaaccordforum.com/foru...1456%5D-18217/
https://honda-tech.com/forums/honda-accord-1990-2002-2/p1456-p1457-codes-2951234/

http://www.obd-codes.com/p0401

http://helpforcars.net/obd_codes/p0705.html

I would begin by checking and testing the Neutral Position Switch.