Mechanics

WHY WON'T MY TRANSMISSION CHANGE GEARS,AND DO IT HAVE A MODULATOR

1998 Ford Expedition • 200,000 miles

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
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Watkins5
September 2, 2011.



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.

Rasmataz
Sep 2, 2011.
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.

Tiny
Watkins5
Sep 3, 2011.
Those codes has nothing to do with your transmission

Rasmataz
Sep 3, 2011.