2015 Duramax NOX sensor issue

R Q

Well-Known Member
Joined
Apr 4, 2005
Location
Charlotte
130k on the truck and CEL came on today. Code is P11cb. Searches say clean the NOX 1 sensor first and after that do a regen. I am seeing that if I were to just replace the sensor that it has to go to the dealer to be reprogrammed so the PCM can learn the new sensor.
Any insight y'all can give me would be appreciated.
I have crawled under and found the down stream NOX but havent located upstream yet. I came in to research.
I guess this truck hasn't done enough work lately for regular regens and it's showing now.
 
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