Duramax Lifetime Supporter
Join Date: Nov 2019
Location: South Georgia
Still dealing with the p0420 code. Nox2 ppm levels are half of nox1. Nox 1 and nox 2 percent levels are near the same most of the time. So what does this tell me?
Is there a calibration of nox sensor with a tech 2? If so how do I do it? I did see a reset but I have no clue of the procedure.
The dpf is down to 9g. The dp is .0007 when cold and .3 when warmed up. I think the dpf is clean and the 9th injector is working properly. The last 3 egts get to 1000+ during a regen.
Nox2 sensor takes a long time to respond from a cold start. I definitely have to drive the truck to get it to start showing values. Nox1 responds after a few minutes of idling.
2014 silverado crew cab 2500 w/t