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#1
10-12-2007, 12:32 PM
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Help (related to EGR)
I have 2002 Explorer XLT 4x4/4.0 SOHC with 110k miles
I tried searching for some info about these codes and was not very successful. Maybe somebody can point me towards a thread that covers how to repair, or tell me what to do next..... Svc. Engine Soon light came on and I had AutoZone read the codes for me a while back, here's what they said: P0401: PCM has determined that there is insufficient flow in the exhaust gas recirculation system P0402: PCM has determined that there is excessive flow in the exhaust gas recirculation system P1400: DPFE EGR circuit low input Any takers? Last edited by JacobK; 10-12-2007 at 12:35 PM. Reason: missing information 
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#2
10-12-2007, 03:11 PM
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Re: Help (related to EGR)
Since you have both the P0401 and P0402, The DPFE sensor is at fault. It is easily replaced.
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