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P0401 Diagnostic Trouble Code Discussion for November 2021

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
1996 Ford Bronco Eddie Bauer 5.8L Excessive Emissions, Stall VIN: 1FMEU15H8T
P0401: egr flow insufficent detected. This one is kicking my butt. Customer states check engine light comes on and sometimes turns off. Connected the scan tool and found LTFT both banks at -25%. STFT were hovering around 0, +/- 5. I checked fuel pressure and found it was good at about 32-38psi...
November 15, 2021