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.
P0403, P1402
Control Circuit = Low Voltage/Open - For greater than 2. 5 s
P1407
Control Circuit = Control Circuit Shorted to Control Circuit - For greater than 2. 5 s
P140F
EGR Valve = Commanded state does not match the actual state
P1424
EGR Control Driver Overtemperature = For greater than 1 s