Possible causes – Faulty Differential Pressure Feedback Electronic (DPFE) sensor (EGR pressure sensor)– Plugged or damaged EGR tube– Differential Pressure Feedback Electronic (DPFE) sensor harness is open or shorted– Differential Pressure Feedback Electronic (DPFE) sensor circuit poor electrical connection Symptoms
Possible causes The upstream hose is disconnected. The upstream hose is plugged (ice). Plugged or damaged EGR tube. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1405 Description While driving, the EGR monitor commands the EGR valve
P1405 HYUNDAI – EGR Temperature Incorrect
P1405 BUICK – Exhaust Gas Recirculation System Valve 3
P1405 CADILLAC – Exhaust Gas Recirculation System Valve 3
P1405 CHEVROLET – Exhaust Gas Recirculation System Valve 3
P1405 GMC – Exhaust Gas Recirculation System Valve 3