why won't my transmission change gears,and do it have a modulator

1998 FORD EXPEDITION
200,000 MILES
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WATKINS5
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my transmisson wont change gears it was hesitant but changed all gears,i changed the transmission fluid and filter,it was changing gears a little hesitation, but know the rpm,s go up and it dont wanna change gears but it moves gradually,so now i wont leave the drive way,in reverse it works normal i ran an obd2 scan and it gave me a few codes but i am not sure i understand if i checked the sensors correctly and dont understand how to check the egr valve, and if it have any relays or which ones
Sep 2, 2011 at 8:02 PM
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RASMATAZ
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It has a code what are they?

Have it towed to a transmission shop and have them pressure test it-to find out more what's going on.
Sep 2, 2011 at 8:15 PM
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WATKINS5
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The codes are P-1504 Idle Air Control, P-0113 Intake Air Temperature Sensor 1 Circuit High Input, P-1401 Differential Pressure Feedback EGR Circuit High Input, P-1409 EGR Vacuum Regulator Solenoid Circuit those are the codes the the scanner gave me.
Sep 3, 2011 at 1:34 AM
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RASMATAZ
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Those codes has nothing to do with your transmission
Sep 3, 2011 at 1:40 AM