Methods and systems are provided for the analysis of one or more diagnostic trouble codes (DTCs), and for the scheduling of vehicle service appointments based at least in part on the DTC analysis. The method involves analyzing the received DTCs to determine an underlying problem. Once the underlying problem is determined, the parts and estimated repair time needed to repair the problem is determined. In one approach, the selection of the proposed slot for the service appointment involves coordinating numerous factors, such as the availability of needed parts, the user's scheduling preferences, and the availability of slots in the dealer's service schedule.