western-j-hawk

i hope this is in the right place here goes i have a 01 sport with a 4.0 for a while ive had codes p0303 #3cyl misfire detected, and p1494 leak detection pump pressure switch or mechancal fault but the other day when i started the rig i had no gauges and airbag light stade on code said p1698 no ccd massage from tcm my book says this code is pcm failure ee prom write denied also after key is on for a couple min. it shows no bus where the odometer is .i know this is long but please all help would be apreceated thanks