NHTSA Complaint #11054680 — 2017 RAM 2500

THIS IS FOR A DIESEL ENGINE VEHICLE. PERIODICALLY (EVERY FEW DAYS), FOR 2 TO 5 MINUTES AT A TIME, UNTREATED DIESEL EXHAUST GASES ENTER THE CABIN THROUGH THE WINDSHIELD AIR VENT WHEN THE VENTILATION FAN IS ON. THIS OCCURS GENERALLY WHEN THE VEHICLE IS MOVING AT LOWER SPEEDS OR NOT MOVING. WHEN THIS HAPPENS, IF I STOP THE VENTILATION AND OPEN THE WINDOWS, MORE EXHAUST GASES ENTER THE CABIN THROUGH THE WINDOWS. WHEN THIS HAPPENS, I HAVE STOPPED THE VEHICLE ON THE SIDE OF THE ROAD AND WALKED AROUND AND SMELLED THESE GASES AT THE FRONT OF THE VEHICLE, UNDER THE HOOD, BUT NOT AT THE BACK OF THE VEHICLE. THIS SEEMS TO HAPPEN COINCIDENTALLY WITH A REGEN CYCLE. STOPPING THE VENTILATION WITHOUT OPENING THE WINDOWS, STOPS THE SMELL IN THE CABIN, BUT NOT IN THE ENVIRONMENT OUTSIDE OF THE CABIN, THE SMELL IS DEFINITELY PURE UNTREATED DIESEL EXHAUST. I TOOK THE VEHICLE TO THE NEARBY DEALERSHIP WHO DID SOME QUICK TROUBLESHOOTING BUT DID NOT FIND THE ISSUE. I DID SOME QUICK SEARCHES ON THE INTERNET AND EASILY FOUND A LARGE NUMBER OF POSITIVE HITS FOR THE SAME ISSUE WITH A SIMILAR OUTCOME AT THE DEALERSHIP. IT SEEMS TO BE A COMMON ISSUE, AND PEOPLE MENTION THAT THEY TAKE THEIR VEHICLE TO THE DEALERSHIP WHERE THE MECHANICS ARE UNABLE TO FORCE A REGEN AND TO REPRODUCE THE ISSUE. SOME PEOPLE REPORT THAT CHRYSLER SAYS THAT THIS IS A NORMAL CONDITION AND RECOMMENDS TURNING OFF THE VENTILATION. I HAVE NOT TALKED TO CHRYSLER MYSELF, I HAVE TAKEN THE VEHICLE TO THE DEALERSHIP ONCE. THE EXHAUST SYSTEM IS GOOD, THE DEF TREATMENT WORKS VERY WELL AND I DO NOT SMELL UNTREATED DIESEL EXHAUST AT THE REAR OF THE VEHICLE.