Check engine light

Wife has a 2013 Chrysler T&C ck eng light has came on 3 times in the last 6 weeks dealer has replaced one part twice and last time the fuel tank light came on wensday and wife took by dealership yesterday service mgr checked it and said that the radio caused the check engine light. I cannot believe this or find a code for radio. Any one have any idea what the code is for radio. If there is one?????? Car runs perfect and all radio functions were working perfect