This fault may be caused by a blocked LPEGR cooler :
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Ducato P0401 P0402 P0236 P0238 and limp mode its 2017 Euro 6, EGR changed, What do I check next | FIAT Ducato
@jansla I am very much thinking there may be two issues at play here. One is a blocking cooler, and the other is there is something amiss with the Turbo Actuator Command. So, perhaps both the chicken and the egg are in play. And speaking earlier of reverse engineering, I suspect we (at least I)...
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