Scr and nox sensor codes

[2014pinnacle]

Hi guys I have 2016 cxu613 I’m getting codes daily for my scr and nox sensor codes. I’m getting P0eb and p0225e I have replace both nox sensors I get about 2 weeks out of them then they start throwing nox sensor codes and I get these codes now twice a day what’s causing it? What else should I be looking at? The gauges run where they should egt never goes over 650 coolant temp never goes over 200 usually sits at 180 unless I get into a hard pull.