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P0404 and P0405 code?
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12-23-2010, 02:10 PM
gearloose1
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You did good.
Often, the fault is electrical (like on my old EGR valve) and a cleaning did nothing to fix it.
A brand new valve from the dealer (never a "reconditioned") is the way to go.
Did you have to clean out a lot of carbon in the plenum?
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