99 caravan 3.0 transmision codes

my transmission started shifting rough and the service engine light came on just after i had my oil changed tonight. I stopped by and had the codes checked and got the following.
P0720 -output speed sensor malfunction
P0732- gear 2 ratio incorrect
P0732- gear 1 ratio incorrect
P0700 -transmission control system malfunction

my question is could they have knocked a wire loose to cause this or am i having real problems ? thanks jeff

It could be the output speed sensor that is bad causing the problem and try that first.Chrysler does have problems with speed sensors.

i took a look at it today and the clip that holds the speed sensor on has came of. i fixed that and re-set the computer and its doing fine now. i guess ill see if it happens again and then replace the sensor. thanks