Exhaust Gas Recirculation Flow. what do i have to do|||here you go.http://www.obd-codes.com/p0400. Now knowing what you have to do, assuming you have all the tools . Good luck. That`s all I am willing to do|||A code P0400 may mean that one or more of the following has happened:
* Plugged EGR passage which restricts the flow of exhaust gasses
* Faulty EGR solenoid
* Faulty EGR solenoid wiring/harness
* Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
* Faulty EGR valve
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