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Old 03-22-2009, 07:12 PM   #1
fordster1960
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Post need code info for code#po405

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
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Old 03-22-2009, 08:56 PM   #2
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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.
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Old 03-22-2009, 11:57 PM   #3
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thanks dewman for the answer on that code #po405 for the 2002 ford f-150 4.6 L helped alot
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Old 10-07-2015, 11:02 AM   #4
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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?
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Old 10-07-2015, 01:28 PM   #5
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Quote:
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?
1) HINT/TIP: You'll find posting in the
Late Model F150s > 1997 - 2003 Ford F150
section more helpful/appropriate than General F150 Discussion posts.
.

2) HINT/TIP: Will need to provide the DTC(s) (Diagnostic Trouble Code). *Can be obtained from /////AutoZone
.
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Old 10-07-2015, 01:33 PM   #6
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I stopped at Auto Zone. there meter didn't tell me anymore than mine did.
A 405 code.
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Old 10-07-2015, 02:34 PM   #7
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Quote:
Greg Berard - I stopped at Auto Zone. there meter didn't tell me anymore than mine did. A (P0)405 code.
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. Click the image to open in full size.
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Old 10-08-2015, 10:41 AM   #8
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Thank you for the information.
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