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International Automotive Technicians Network
Re: Failed Nox At 25 Mph
Posted to Technical Discussion Forum on 1/15/2021

with no air injection present thats a BUNCH of o2 left over, coupled with relatively low amounts of C02 (14%) and thats not a good sign for that new cat.. i'd check some basic things such as manually operating the egr to verify engine stalling, and also, and t... Login to read more.