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p0406 code
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  1. Newbie Check In!
    I have arrived at this site looking for information on a p0406 code. CEL goes on and off intermittently. The car has run flawlessly for 120K+ miles. This is the first malfunction of any kind. My OBDII reader says "flow sensor pressure high" and some posts referene a faulty EGR valve. Anyone...
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