Thanks Herb. Yes, tDEF system problems and codes can definitely eventually cause an engine de-rate. The mystery is that Spartan seems never able to give you a hard number on when that is likely to happen so you are in the dark as to how far you can go before it needed attended to. Frustrating. Good yours resolved.
Gary and Dee, Zowie and Bowie (traveling cat sibs)
2019 Cornerstone 45B, X15-605hp, Imperial, Spartan K3,
2013 Honda CR-V toad, Demco Excali-Bar II,
Demco Baseplate, Demco Toad Light system, 73 de W5Fi