Problem with the check engine light coming on triggered by the transmission on 2003 Kia Rio

The check engine light keeps coming on from the transmission control module. I passed the emissions part of the test but failed because of the light. How much does the updated module cost?

Asked by for the 2003 Kia Rio
1 answer
how many miles on veh? could this be covered under your 10yr 100k miles factory warranty?