P1405 DPFE Sensor Upstream Hose Off Or Plugged

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 closed and checks the differential pressure across the EGR orifice. The test fails when the signal from the DPF EGR sensor indicates EGR flow is in the negative direction.
    P1405 Information for specific makes
    P1405 BUICK
    P1405 CADILLAC
    P1405 CHEVROLET
    P1405 FORD
    P1405 GMC
    P1405 HYUNDAI