PO406 /check engine light on

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04-05-2014, 04:49 PM

ron barbrey

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PO406 /check engine light on

Check engine light on. Replace DPFE, still came on. I found moisture on the REF leg of the DPFE and my truck almost cuts off at idle. Thanks

04-05-2014, 05:26 PM

hanky

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You might want to check to make sure the EGR valve is not hanging open .

04-05-2014, 07:50 PM

ron barbrey

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Check engine light on

just replaced EGR valve, reset light, has not come back on yet, but did not help the idle.

04-06-2014, 10:55 PM

ron barbrey

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check engine light

Drove today for about 100 miles and then the light came back on. This code this time is PO401. Any suggestions anyone. This is a tough one.
Thanks

Quote:

Originally Posted by ron barbrey

just replaced EGR valve, reset light, has not come back on yet, but did not help the idle.

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