2019 ENTEGRA ASPIRE Engine Problems

Motorhome engine went into derate mode because of faulty DEF sensor. Spartan is the chassis manufacturer and advises this is a common problem with the DEF sensors. We have since learned there is a protocol to follow to keep engine from going to 5 MPH derate mode but did not know about this at time and Spartan apparently did not know it either because they advised just getting off the road ASAP. Luckily we avoided shut down on I-95 but if it occurred on a busy interstate the safety ramifications are enormous. It seems to me a safety recall should be issued on all vehicles with this defective part and the design changed so that if a failure occurs, reasonable advance notice should be incorporated in the design as I understand some trucks have.

Diesel Exhaust Fluid (DEF) head failure. Diagnostics codes SPN 3364 / 1761 / 3031 The offending unit is not available from me, the mobile mechanic took it with him. My Motorcoach derated. I was able to get to a safe parking spot, where I waited one week to be repaired, (1000 miles from home) Could not move from that spot, as top speed was limited to 5 MPH. I was warned during travel by dashboard warning lights to check engine. It was good I was aware of potential DEF head issues, so I immediately checked the diagnostic codes, then immediately found a safe place to stop. I contacted Spartan, Entegra, and Coachnet, whom between them, acknowledged the problem and sent a replacement head. Once the head was replaced, fault codes were cleared and I was able to continue. So, other than the monitoring head itself being faulty, all the inputs...

DEF head failure

COMPUTER SHOWED CODES FOR DEFECTIVE DEF HEAD. WE HAD A GEN5. ENGINE WILL DE-RATE DUE TO THOSE CODES. THE CODES APPEARED AS SOON AS I STARTED THE ENGINE FROM A PARKED POSITION.