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#1
07-10-2005, 09:25 AM
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obd codes 401&402
my daughter's explorer is showing two codes. po401 egr insufficient flow detected and po402 egr excessive flow detected. help me. where should i start?
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#2
07-10-2005, 02:35 PM
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Re: obd codes 401&402
95% of the time if you get both codes, it is the DPFE sensor. You may want to look at the wiring to be sure the wires are not touching. But, most of the time it is the DPFE.
__________________
Being way2old is why I need help from younger minds The sooner you fall behind the more time you'll have to catch up.  HEY Y'ALL--READ THIS Here are some of our old vehicles for sale. 
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#3
09-27-2006, 09:39 PM
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Re: obd codes 401&402
I have had some surging and rough running engine the code came back as 402. Would this be the sensor as well? I have gone over the engine compartment vacuum lines and replace most of them.
Thank for any advise
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#4
10-14-2006, 08:11 AM
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Re: obd codes 401&402
dpfe sensor solved the problem. thanks
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#5
10-14-2006, 08:53 PM
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Re: obd codes 401&402
Thanks for fix reply. Appreciate it.
__________________
Being way2old is why I need help from younger minds The sooner you fall behind the more time you'll have to catch up. HEY Y'ALL--READ THIS Here are some of our old vehicles for sale.
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#7
12-13-2006, 08:10 PM
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Re: obd codes 401&402
DPFE is probably only a dealer part / or the aftermarket parts houses refer to them as something else / EGR sensor ETC .
However it is best to go with factory parts especially DPFE sensors , you will probably get a kit from Ford with a new (different looking) sensor and a new wiring connector
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