I have a question - my Acura has a Check Engine Light on and AutoZone scanned it for me (twice) and they get the code that says "EGR valve flow insufficient". I know what the EGR valve does - it puts the exhaust back into the cyliders to reduce emissions. Can I still drive it for a long time if my EGR valve is not working? Or will this hurt my engine in a long run?

Thanks for any help!
Chris