Detection Condition
WARNING: This page is about a different car, the 2003 Mazda B4000, 2003 Mazda B3000, and 2003 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P1400 indicates average voltage of DPFEGR SIG circuit input is less than the minimum of 0.2 volt.
- DTC P1401 indicates average voltage of DPFEGR SIG circuit input is more than the maximum of 4.5 volts.
DPFEGR sensor measures the actual pressure drop across the metering orifice and relays a proportional voltage signal to PCM.