Nox sensor abnormal update rate./speed sensor

[DT_Duh_Trucker]

(05-22-2021 )Rawze Wrote:  as long as the codes do not stay active, it should not derate on you.

You cannot clean NOx sensors. The manufacturer for them say they might be able to be cleaned a bit but they will ready really incorrect after. - NOx sensors are rated for about 250k miles or so (or equivalent engine hours). If it is older than that, might be best just to replace it.. but communications error is not the same as a bad sensor... you need to ensure it is not a wiring harness issue.

I've got 472k on her now. Have no idea if they were ever replaced prior to be owning the truck. Think it's about time to replace them. Just recently replaced the nh3/amonia sensor so maybe it's time for the nox sensor 1 now. I'll test to make sure it's getting proper voltage first though.

Thanks rawze.