Midland Oilfield Posted February 11, 2023 Share Posted February 11, 2023 I’ve got a 2013 GU713 that went into derate. I pulled it in and scanned it and it threw a code for NOx sensor 1 being bad and needing a forced regen. I replaced the sensor and did the regen, but the truck is still in derate. I rescanned the truck and it shows no codes. So currently all programs are updated, no codes, and I even tried just disconnecting the batteries and nothing has worked. Any suggestions y’all might have for things to check or try would help out a lot. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/ Share on other sites More sharing options...
fjh Posted February 11, 2023 Share Posted February 11, 2023 I am no guru here on this subject however are you using PTT ? You May need to do Learned Data RESET for this not sure!? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/#findComment-525130 Share on other sites More sharing options...
Midland Oilfield Posted February 13, 2023 Author Share Posted February 13, 2023 I have been jumping between PTT and a CanDo HD. I have never tried doing a learned reset on something, ill look into trying this. Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/#findComment-525283 Share on other sites More sharing options...
Adkat Posted February 13, 2023 Share Posted February 13, 2023 Recently had an x15 Cummins derate from high nox count due to blockage in urea filter, had to be driven for 30mins loaded to turn active fault inactive, before able to clear it. Not much fun with no power. F your def onto something, any time a component is replaced, learned data reset should be done. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/#findComment-525292 Share on other sites More sharing options...
Solution Midland Oilfield Posted February 16, 2023 Author Solution Share Posted February 16, 2023 I did the relearn, and after multiple regens and messing with stuff the def pump started leaking at the filter housing. Replace it with a new pump and everything went back to running like normal. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/#findComment-525415 Share on other sites More sharing options...
fjh Posted February 16, 2023 Share Posted February 16, 2023 10 hours ago, Midland Oilfield said: I did the relearn, and after multiple regens and messing with stuff the def pump started leaking at the filter housing. Replace it with a new pump and everything went back to running like normal. thanx for posting your fix bro! Quote Link to comment https://www.bigmacktrucks.com/topic/72503-scr-derate-help/#findComment-525427 Share on other sites More sharing options...
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