Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
P205B
Signal circuit = Not within a calibrated range
P205C
Reductant Temperature = Warmer than 80°C (176°F)
P205D
Reductant Temperature = Colder than -39°C (-38°F)
P205E
Signal circuit = Intermittent