bigredhdt Posted September 6, 2019 Report Share Posted September 6, 2019 I have a d12d and am wondering if a message pops up when the ecm derate the engine. If not, how do you know other than seeing how it's pulling? Quote Link to comment Share on other sites More sharing options...
sclord2002 Posted September 6, 2019 Report Share Posted September 6, 2019 I get a check engine message when mine derates due to an EGR fault. It seems to be a 15 to 20 percebt derate. It will show up in your codes. Charlie Quote Don't ever tell a soldier that he doesn't understand the cost of war. Link to comment Share on other sites More sharing options...
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