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Old 03-28-2010, 12:38 PM
jec jec is offline
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2001 Maxima
1999 Maxima
 
Join Date: Dec 2009
Posts: 4
Default P0400 troubles here too!

I have a 1999 Maxima with this same P0400 code. I took the advice and tried cleaning the old valve and the tube and the intake side. It all seemed cleaned. I reinstalled the valve, cleared the codes but could not get the EGR monitor to complete on my scan tool. After running it for a while the monitor completed and the CEL and code returned, bad EGR valve I concluded.
I removed the old valve and installed a new one (autozone). I again cleared all codes. This time the EGR monitor completed immediately and the CEL light stayed out for several days. The CEL is now back on and the P0400 code is back.
Any advice on what to try next? Thanks in advance!
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