With ATSG having the opportunity to help shops solve problems, sometimes we get faced with some real doozies. A shop will call and give us a laundry list of DTCs, leaving us to think someone must have a bulkhead connector unplugged. We then go through the arduous task of deciding which codes prompted other codes to set—we’re actually diagnosing diagnostic codes themselves at that point. So, when an issue comes up on our help line with codes that actually tell the story, it makes for a nice change, as well as a quick pathway to a repaired vehicle.