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Detection Condition

WARNING: This page is about a different car, the 2002 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

DTC P1405 indicates exhaust manifold side (upstream) DPFEGR sensor pressure hose is off or plugged.

DTC P1406 indicates intake manifold side (downstream) DPFEGR sensor pressure hose is off or plugged.

Differential Pressure Feedback (DPFEGR) sensor measures actual pressure drop across the metering orifice and relays a proportional voltage signal to PCM.

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