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Optional Information: 2001 Ford Expedition xlt Triton 4.6 LAlready Tried: none
HiCustomer
Thank you for asking your question on Just Answer.
The code P1401 is in most cases set due to a bad DPFE ( delta EGR pressure sensor) . Replacing it should correct you issue. Enclose is location.
Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs