P1406
P1406 is the Delta Pressure Feedback Electrical Sensor This sensor is located in the Exhaust Gas Re circulation system. The DPFE sensor measures the amount of exhaust flow when the EGR valve is open. So locate the egr valve and follow the pipe that has insulation on it there will be 2 pipe nipples on this pipe one of the hoses has fallen off or has a hole in it the code has identified the one closes to the exhaust manifold .
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