A method and computing system for determining whether a DTC set in a vehicle involved in a collision is collision-related or non-collision-related. The method can include determining a vehicle model associated with the vehicle, determining a DTC set within an ECU in the vehicle, determining a damaged portion in the vehicle, determining the DTC is collision-related, and outputting a collision report that indicates the DTC is collision-related. The determined damaged portion indicates where the vehicle was damaged by the collision. Determining the DTC is collision-related can include determining the damaged portion in the vehicle matches a reference vehicle portion associated with both a component attributable to setting the DTC and the vehicle model associated with the damaged vehicle. The collision report can indicate that a different DTC set by the same or a different ECU in the vehicle is non-collision-related.