The SCR assembly contains a catalyst brick that requires DEF, or diesel exhaust fluid, for activation. The second sensor (referred to as NOx sensor 2) measures NOx levels exiting the SCR catalyst. The assembly uses two NOx sensors: the first sensor (referred to as NOx sensor 1) is located near the turbo downpipe and measures engine out NOx. best heat pump brands 2022Watch for helpful tips and best practices when installing a NOx Sensor.Vehicle used: 2018 Dodge Ram 2500 6.7 Cummins To learn more, visit. hugo 404 page not found x list of shipping companies in kuwait. anchorage flight school safe overclock for ryzen 7 5800x. "/> The assembly uses two NOx sensors: the first sensor (referred to as NOx sensor 1) is located near the turbo downpipe and measures engine out NOx. During a DPF service regen, the SCR is too hot to reduce NOx effectively.
(As an example the upstream NOx ppm should be near 100ppm when the downstream NOx sensor 2 is around 30ppm or less). During a RFQT, the downstream NOx ppm should read roughly 70% less than the upstream NOx ppm on a healthy system.
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