P0400 EGR System Problem

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nismogarcia
Posts: 40
Joined: Tue Jul 15, 2008 9:18 am
Car: 06 infinity g35 coupe , 06 nissan pathfinder, 94 nissan hardbody , 01 nissan sentra 2.0 , 71 datsun 240z

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Im working on my cousins 97 Nissan Hardbody and I got this code, just wondering if anyone can help point me in the right direction , what trips this code a stuck open or plugged EGR valve , EGR Temp sensor ?

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navysnail
Posts: 3335
Joined: Wed Feb 11, 2004 1:33 pm
Car: 1990 Nissan 240SX fastback

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check the vacuum hose going to it for cracks, as that would keep it from opening.
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