Where is the sensor for code P20E2

Question

I have a 2011 Silverado 2500HD 6.6L duramax and I had code come up for exhaust gas temperature sensor want to know which one it is on the turbo downpipe or right before the catalyst

Answer 1

P20E2 Exhaust gas temperature 1-2 not plausible

This would be for the exhaust gas temperature sensor 1, this would also be a equivalent code for a P0545

use this diagram so we are talking the same location