On my way to get my oil changed this morning, my check engine light came on. When I got to the oil change place, they checked the diagnositic code. They were unsure of what it was and looked it up on the Jeep website. Apparently there is an issue with a Transmission Module. Can any one provide me with an idea of what this repair is and how much it may cost? I've never heard of anything like this before. 2011 Jeep Compass Limited.