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Re: DPFE sensor?
Welcome to the forum!
Since you didn'g mention if you have the 3.0L 12V or the 3.0L 24V, I'm going to assume you have the 12V (Vulcan). Per the factory service manual, the ground for the DPFE is the Gray/red wire. The reference voltage is provided via the brown/white wire, and the signal to the PCM is the brown/light green wire.
Have you tried searching this forum for P1401? Others may have found sources for this code other than what the service manual (info below) suggests.
Also per the factory service manual, the following are suggestions for the P1401 code:
Possible causes:
-- DPFE SIG open.
-- DPFE SIG shorted to VREF or PWR.
-- VREF shorted to PWR.
-- SIG RTN open.
-- Damaged D.P.F. EGR sensor.
-- Damaged PCM.
-Rod
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