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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23001
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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F250 Super Duty: 1999 F250 super duty 6.8 l triton with p0401

Customer Question

1999 F250 super duty 6.8 l triton with p0401 & p0402 codes. Replaced D{F{E with a new one from Ford. Now I have P1401 code. I see several suggestions for what to do next. Thoughts?
Submitted: 1 year ago.
Category: Ford
Expert:  EricFromCT replied 1 year ago.
The p1401 in the pcm is indicating that it is seeing too high of a voltage from the dpfe sensor. I would make sure you have a good connection at the connector for the dpfe. The pcm should be seeing 4.5v or less with key on engine off or running. If the connector has a poor connection the pcm will see 5 volts. Do you have a scan tool that can monitor the dpfe sensor?
Expert:  EricFromCT replied 1 year ago.
Hi. Did you figure out anything with your truck? Do you need more assistance?

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