OBD II code P Exhaust EGR Flow Insufficient - Ford error code p0401 escort
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The OBDII fault code P means that the engine computer has detected that When diagnosing the code P on a Ford vehicle, the DPFE sensor and the. This code is an EGR code for insufficient amount of egr. It could be that the egr tube is clogged or the egr itself is bad or there is not enough.