2017 NEWMAR DUTCH STAR Engine Problems

My DEF sensor failed which required towing on Interstate 80 in a highly congested area. This same failure has happened to many other motorhomes and trucks. It creates a very unsafe situation which needs to be corrected. Please require the manufacturer to correct the flaw and recall all in use. Thank you.

RV WENT INTO 5MPH DERATE DUE TO DEF HEADER MALFUNCTION. I WAS VERY LUCKY TO BE IN AN RV PARK, HOWEVER THERE IS NO WAY TO REPLACE THE DEF HEADER WITHOUT RAISING THE RV (DUE TO THE LOCATION OF THE TANK), SO IT COULDN'T BE REPLACED THERE. I HAD AN APPOINTMENT TO REPLACE THE DEF HEADER AT FREIGHTLINER OF HOUSTON, DUE TO THE WARNING LIGHTS. HOWEVER WHEN I STARTED TO DRIVE THERE FOR THE APPOINTMENT, I FOUND THE RV WOULD NOT GO OVER 5MPH. SINCE THE DEALER WAS 60 MILES AWAY (AND IT WAS THE NEAREST ONE), THERE WAS NO WAY I COULD MAKE IT.

WE HAVE HAD TWO DIESEL EXHAUST FLUID (DEF) HEAD FAILURES THAT HAVE REQUIRED REPLACEMENT OF THE DEF HEAD UNIT. THE FIRST SITUATION RESULTED IN A DERATING OF THE ENGINE, LIMITING OUR SPEED TO 4 OR 5 MPH WHILE ON THE INTERSTATE. THE VEHICLE HAD TO BE TOWED 200 MILES TO A SERVICE CENTER, THEN IT TOOK A WEEK TO OBTAIN REPLACEMENT PARTS. THE SECOND SITUATION HAPPENED WITHIN 5 MILES OF A SERVICE CENTER AND WE WERE FORTUNATE ENOUGH TO BE ABLE TO MAKE IT TO THE SERVICE CENTER. HOWEVER, WE ARE SEEING HUNDREDS OF SIMILAR SITUATIONS BEING POSTED TO RV FORUMS ON VARIOUS SOCIAL NETWORKS. A RECALL NEEDS TO BE MADE FOR ALL CUMMINS ENGINES THAT HAVE DEF SYSTEMS. AS PART OF THE SOLUTION, THE DESIGNS NEED TO BE CHANGED SO THAT THE ENGINES CAN CONTINUE TO RUN WITH THE DEF ERROR CODE RATHER THAN SENDING THE ENGINE INTO A...