Detection Condition
WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0405 or P1405 indicates exhaust manifold side (upstream) DPFEGR sensor pressure hose is off or plugged.
- DTC P0406 or P1406 indicates intake manifold side (downstream) DPFEGR sensor pressure hose is off or plugged.
DPFEGR sensor measures actual pressure drop across the metering orifice and relays a proportional voltage signal (0-5 volts) to PCM.