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Posts Tagged: Ford EGR

P0401 P1408 — Ford

Fix trouble codes P0401  P1408 on a Ford vehicle Fords with P0401,  P1408 trouble code are known for problems with their DPFE sensors. These sensors detect the change in manifold vacuum pressure when the EGR is commanded on and off and display P0401,  P1408 trouble codes. If you get an EGR code, DO NOT automatically assume that it’s a bad EGR valve! Get a hand held vacuum pump and apply vacuum to the EGR. Check the operation of the valve. It if moves properly and the passages are clean, move on … Read More

Ford DPFE sensor and EGR System

Fix a Ford DPFE EGR sensor problem The Ford DPFE and EGR systems are unique and you must understand how they work if you want to diagnose and fix them. This article explains how DPFE works with the EGR system on Ford vehicles. Car makers recycle exhaust gas back into the engine to reduce combustion temperatures and pollutants. However, in order to make the engine run smoothly car makers have to meter the recirculated exhaust, injecting it into the intake manifold only under the proper conditions. To do that, they … Read More


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