1998 Ford Expedition DTC P0401

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49ERFAN33
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Engine Performance problem
1998 Ford Expedition V8 Two Wheel Drive Automatic

If the vac. line that runs from the EGR Tube to the high side port of the DPFI sensor has been replaced with regular vac hose insted of the special vac line with the thick orange inner lining could the incorrect vac line collapse and trigger that dtc?
Mar 15, 2010 at 3:41 AM
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JACOBANDNICKOLAS
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PO401 - Exhaust Gas Recirculation Flow Insufficient Detected

To answer your question, yes.
Mar 15, 2010 at 3:54 PM
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