check engine codes

I have a 95 Cherokee 4.0L, AT that suddenly started throwing check engine codes....the codes it gives me are 14 and 15. they mean that my MAP sensor voltage is too low or high and that the speed sensor is not functioning correctly. i replaced my MAP yesterday and i still get these codes after 40 min or so of driving. if anyone has any idea what is causing these errors or how to repair them i would apperciate the input.

I have a 95 Cherokee 4.0L, AT that suddenly started throwing check engine codes....the codes it gives me are 14 and 15. they mean that my MAP sensor voltage is too low or high and that the speed sensor is not functioning correctly. i replaced my MAP yesterday and i still get these codes after 40 min or so of driving. if anyone has any idea what is causing these errors or how to repair them i would apperciate the input.

DID YOU CHANGE BOTH THE MAP SENSOR & THE SPEED SENSOR. ITS POSSIBLE THE SPEED SENSOR WIRES MAYBE BAD OR CRACKED. TRY REMOVING THE GROUND CABLE ON THE BATTERY FOR 5-10 MINS. HOPE THIS HELPS DALE [email protected] :2cents:

thanks dale...i replaced the speed sensor less than 2 months ago.....