Joshzinsky Posted February 8, 2018 Share Posted February 8, 2018 Hello, my truck says evaluating dad quality 8kph limit removed and it will not go out. I have one engine code 1231-9 ecm missing signal from acm. I have changed both nox sensors, dad pump and harness, the acm, checked the wiring up the frame into the ecm. I have power and ground at the acm. Changed the power cable end at the batteries for the acm and checked the fuse. Seems like a datalink issue. Any ideas?? Quote Link to comment https://www.bigmacktrucks.com/topic/52450-def-quality-being-evaluated/ Share on other sites More sharing options...
HeavyGunner Posted February 8, 2018 Share Posted February 8, 2018 There is a tool for assessing the quality of def. The quality of the def will throw codes. I’ve seen our shop use the “scope” to assess the quality of the def. Quote The problems we face today exist because the people who work for a living are outnumbered by the people who vote for a living.The government can only "give" someone what they first take from another. Link to comment https://www.bigmacktrucks.com/topic/52450-def-quality-being-evaluated/#findComment-391491 Share on other sites More sharing options...
Joshzinsky Posted February 10, 2018 Author Share Posted February 10, 2018 Had the software updates done on the ecm and acm.problem solved. Quote Link to comment https://www.bigmacktrucks.com/topic/52450-def-quality-being-evaluated/#findComment-391658 Share on other sites More sharing options...
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