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How do I clear code P0402?

(1999 Ford Escort)
in Moreno Valley, CA on April 26, 2015
Do I need to clean the EGR valve?
Displaying 1 answer & 4 comments
Popular Answer
on April 26, 2015
fix the excessive flow problem with the egr system.the pressure sensor could be bad,and also the egr valve may be clogged up with carbon,or vacuum problem?
there ain't no use to clear it,cause it will come back on.take the valve off and look at it,probably needs cleaned.check all vacuum hoses.post findings..
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on April 26, 2015
Ok so I should replace EGR pressure feedback sensor and clean EGR value including lines.

If doesn't clear code then replace EGR valve. Is that correct?
on April 26, 2015
check vacuum hoses,check the one on the valve,check all of them for vacuum leaks.you may be able to clean the valve,check for carbon where the valve bolts up.i wouldn't replace anything just yet.check the 2 hoses coming off the pressure sensor also.that valve is $45.00.the pressure sensor is $72.00.if your pressure sensor is metal,it is probably the original,cause the ones you get now are plastic.there are upgraded hoses for the dpfe sensor also for around $14.00.carbon is your enemy here,and vacuum flow.so check simple things first,and don't throw money at it.i know a guy who replaced EVERYTHING on his egr system,2 times,before finding out that the egr passages on the throttle body were COMPLETELY CLOGGED WITH CARBON.post findings..
on April 26, 2015
Thank you, I'll reply with the outcome.
on April 26, 2015
your welcome.post findings
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