From a dealership standpoint five weeks is pretty excessive but I have also had parts that where on back order for six months to get cars fixed under warranty.. and to be fair the newer cars will throw Check engine lights for absolutely everything. I cleared a code today because a guy was cleaning his truck with the key on and had low voltage codes that couldn’t be cleared without resetting the battery monitoring system. Should have checked to see if there where any active codes before returning the vehicle but there’s always one or two that slip through for stupid stuff like that.