I've had my CEL on for about a month now (I know I know). The code came out to be a P0400 which I know is an EGR code. The question is what are some of the ill affects that the cars going to endure with a dirty/broken EGR valve? I have been driving like this for some time now and I dont feel a diffrence in the ride quality. Aside from ride quality can this problem seriously affect the engine? Any advise will be much appreciated.
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