My Check Engine Light Will Not Turn Off For Nothing

Ive had my 98 chrysler sebring lxi for two years now and ive poured over 2000 into it on struts,new transmission , new axle assembly for both front wheels ,muffler, and the annoying LEAK DETECTION PUMP and my check engine light STILLLL wont turn off..when i first had it for about two months the check engine light used to stay on until i would hit a bump or a railroad track then it would cut off..But NOWW its FOREVER on...the codes are p194 and p1495 and i have gotten those parts replaced and still nothing..ive even had the connector checked to see if i had any voltage coming thru to the ldp pump and it was..what else could it be? Im process of getting a NEW engine computer for it.. i was told if everything else didnt work this has to be my problem.so for a head start i went to the junkyard and bought a used one and its still on..please help