14 dd15 cascadia 820,XXX miles. I typically run the same route 3-6 times a week. There's a section of hills (flint hills on I-70) that sets off the poor def quality/service emissions codes as well as the 55mph derate almost daily. If I pull over and do a parked regen the check engine/derate clears. If i keep driving the check engine/derate clears in 15-60 miles. Dpf recently cleaned. Seems to be an issue only under heavy consistent load since I can drive anywhere else without issue. Any ideas where to start?
Low nox issue only when climbing hills
Discussion in 'Freightliner Forum' started by Casampson.co14, Oct 16, 2020.
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