fordster1960

Hi does anyone know the part or problem for check engine light code po405 on a 2002 ford f-150 xlt supercab 4x4 with 4.6 L motor any help would be great

dewman

That code is related to the DPFE sensor with low voltage.

from Wikianswers: "Dpfe sensor is the delta (differential) pressure feedback egr (exhaust gas recirculation) it monitors the pressure on the egr valve to make sure it is working."

I am not sure where this sensor is located, one of the mechanics here should be able to let you know where to look. I think you can buy them from the local auto parts store.

fordster1960

thanks dewman for the answer on that code #po405 for the 2002 ford f-150 4.6 L helped alot

Greg Berard

I can not get the service engine light to stay off in my 2003 F150, 4.6.
I have changed the EGR valve, EGR sensor, and the DPFE sensor.

Any ideas?

gDMJoe

1) HINT/TIP: You'll find posting in thesection more helpful/appropriate than General F150 Discussion posts.
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2) HINT/TIP: Will need to provide the DTC(s) (Diagnostic Trouble Code). *Can be obtained from /////AutoZone
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Greg Berard

I stopped at Auto Zone. there meter didn't tell me anymore than mine did.
A 405 code.

gDMJoe

Given that you've "changed the EGR valve, EGR sensor, and the DPFE sensor", the throttle body and/or adapter may be coked and needs to be cleaned.
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Greg Berard

Thank you for the information.