code po401
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Cross-Country
Joined: Jul 2003
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code po401
I have a 97 F-150 with a 4.2 V-6 recently I have been having trouble with this code po401 and a low rpm miss. Like I had said in another post a while back I replaced egr,dpfe and regulator everything associated with the egr, but still having the check engine light and miss. Does anyone have any ideas of what to do? Also cleaned the ports. Any suggestions would be greatly appreciated.
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