It is important to keep up with a vehicle, to find out if there are issues a scanner will read codes. The code P1401 means DPFE Sensor Circuit High.
insufficient egr flow
Trouble code P1401 means: DPF EGR sensor circuit high voltage detected
insufficient egr flow
EVAP Purge Solenoid Stuck Open or Closed
Code P1401 means:Differential pressure feedback electronic sensor circuit high voltage
P1401 is DPFE sensor circuit high, check out this tutorial to replace the sensor on your Ford
P1401 - Differential Pressure Feedback EGR sensor ( DPFE ) circuit high voltage detected
P1401 is DPFE Sensor Circuit High Faulty Differential Pressure Feedback Electronic (DPFE) sensor. Loose of disconnected wiring to the sensor
P1401 Differential Pressure Feedback Electronic Sensor circuit High Voltage Start by checking the connections on your EGR hoses and vacuum lines.
Why doesn't my mercry get up to operating tempatue
The P stands for the Powertrain. The 1 stands for Manufacturer specific. The 4 stands for Auxillary Emmission Control System. The final 0 & 1 ( as 01) identifies the section of the system that is malfuntioning.
It depends on the make, but most likely a malfunction of the egr temperature sensor.