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What is your question?
I just put new plugs and wires on my 3.3L engine and now it idles worse than before. I am getting codes P0404 and P0406. Would the EGR valve go bad that quickly? Bad idle just started after plug and wire change.
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It's possible that a bit of carbon is stuck in the EGR valve causing it to leak at idle, which would cause rough running. Those diagnostic codes relate to the EGR valve position sensor reading out of range, which could be caused by a stuck EGR valve. The codes reflect the EGR flow to be too high, and out of range. If you want to find a Chrysler specialist, here's our directory link for you: https://repairpal.com/chrysler-repair-in-wilmington-ohio