2018 Newmar Dutch Star: check engine light

Filed Aug 2, 2021 · LA

Three week ago today we were 500 miles into a road trip when the check engine light and alarm went off - we exited interstate at the next exit, called Spartan, and read off the codes. We were told that it was a DEF sensor that would be derating our engine and we need to get somewhere soon.. We were too far from home and made it another 130 miles with notice of some power loss. These sensors are back ordered until late August - mid September. After discussion with a Cummins service center in Chattanooga, TN it is deemed unsafe to drive the 90 miles to there location. We are told that the engine will derate down to only 5 miles per hour which will lead to a very unsafe driving condition for ourselves and anyone on the road with us. My understanding is that it's just a sensor messing up - the regent was performed as normal while the engine light was lit - indicating all was working with that system.

Filed Jul 18, 2021 · Engine · SD

We got the check engine light on after starting up our coach on July 6. We got several fault codes: SPN 3364 FMI 9, SPN 1761 FMI 9, SPN 3031 FMI 9. The codes indicated that we had a faulty DEF Header and it needed to be replaced. And if we drove the coach at some point it would "derate" to 5 miles an hour and we would not be able to drive it. We were told by the chassis maker (Spartan) that we would likely not be able to get a replacement part until September or October due to the global microchip shortage. And even though there was nothing actually wrong with engine or the DEF (we had a full tank) there was no work around. Because we were in West Yellowstone where there was no diesel engine service nor a place we could leave the coach for several months. We decided to drive the coach to our next destination, Lander Wyoming which had two Cummins engine shops. We made it there, but then got the "stop engine" code - SPN 5246 FMI 16. The coach derated and we could no longer drive it. The Cummins service shop was able to clear the "stop engine" code, so we could drive it. But the check engine codes would remain until the DEF header was replaced. And countdown would restart to "stop engine". On the irv2.com RV blog forum, Spartan chassis owners, with Shaw DEF headers have reported the DEF header failure. A number have had multiple failures. Since it seems as though it may be months before a supply of DEF headers will be readily available and there is nothing fundamentally wrong with the engine, it would be tremendously helpful for Cummins or Spartan to design a workaround while the parts supply is rebuilt and it seems likely that Shaw needs to redesign their DEF Header to reduce the failure rate or Spartan needs to find a new supplier.

Filed Jul 18, 2021 · Engine · FL

Since purchasing this RV new, I have had the DEF Head fail twice. 1st time was Sep 2019 with a mileage of 14066 and the 2nd time was April 2021 with a mileage of 16018. Both times DEF Header Assemblies were replaced. When these fail the motor can de-rate at any time. Very dangerous when traveling down the highway. Both times the low DEF warning and check engine lights came on.

Filed Jul 18, 2021 · Engine, Fuel system · TX

When preparing to leave, my coach received a check engine light, and 3 error codes from the Cumins ECU. SPN 3364, 1761 and 3031. All FMI code 9. My engine is Likely now debated to 5% power and I was just able to return it to the driveway at the house. Thankfully I hadn’t gotten onto the busy interstate when it happened. After contacting Spartan Chassis, they informed me that I needed a new DEF Head unit. This has been a major issue across the industry. The part is manufactured by SHAW and parts are not available. I was told by Spartan “August or September” for parts. I am unable to move the coach for fear that it is in fact debated to 5% so will need to have a mobile mechanic dispatched to replace. I understand the need for emission controls, but to derate the engine because we might have a little bit dirtier tailpipe until its fixed…. Major safety issue as there is NO workaround.

Filed Jul 17, 2021 · Engine · FL

The failure has occurred in the emission system. The DEF SENSOR set off 2 Check Engine light warnings on the dash. It did not tell me any other information. I was fortunate to return from my trip without incident. However, after speaking with the chassis manufacturer (Spartan), I was fortunate to be able to continue. Had I gone any further the engine would have begun a shutdown leaving my 24 ton RV stranded roadside. It could have been very serious breakdown on a metro highway causing major traffic jams or left stranded in a remote location. The component required for replacement is not available till late Aug or Sept. As we live full time in the RV we are now stranded unable to travel until the part is available. Although our example appears to be an inconvenience we have dozens of other RVers experiencing this same problem and unaware of being stranded until the failure occurs. Whatever is causing the failure of these DEF sensors, owners should be notified and a general recall for replacement should be issued.

Filed Jun 21, 2021 · Engine · SD

Shortly after departing from J&J RV Park in Hot Springs, Arkansas, in my vehicle, a motorhome, two yellow check-engine lights illuminated on the dashboard. I continued driving for 52 miles to my next destination, Downtown Riverside RV Park in North Little Rock, Arkansas. The engine ran normally, and I arrived safely. I checked the vehicle's computer system on the dashboard and located three trouble codes: 3364, 1761, and 3031. I contacted the vehicle's chassis manufacturer, Spartan Chassis in Charlotte, Michigan, and was told the codes indicated the vehicle's Diesel Exhaust Fluid (DEF) head was defective and needed to be replaced. The gentleman told me not to drive the motorhome and to remain in a safe haven off the road, which in my case is the RV park. He said the limited number of DEF heads in Spartan's inventory are being held for customers whose engines have displayed red stop-engine lights, gone into limp mode and stranded the customers on the side of a road. Those customers receive a new DEF head by overnight mail, are back on the road within a couple days and are able to continue their normal travels. The limited inventory does not allow for customers like me who are not broken down somewhere to receive the DEF head quickly. Spartan's inventory is not anticipated to be replenished until sometime in August 2021. Therefore, if I choose to follow Spartan's recommendation, which I plan to do, I have to cancel campground reservations and summer travel plans and stay in place for at least two months. I'm on a waiting list to receive the part. This is a well-known, long-term problem on motorhomes manufactured by Spartan and other companies, and is supposedly affecting the trucking industry. It has been much discussed on online forums. Spartan's DEF head is produced by Shaw Development LLC in Bonita Springs, Florida. The problem has not been confirmed by a local dealer or independent service center. The vehicle is available for inspection.

Filed Jan 6, 2021 · Engine · 5,000 miles · LA

Check engine light came on, contacted cummins with code. I was told the def head needed to be replaced. Motorhome had 5211 miles. Made an appointment and had head replaced