New EGR valve went bad with P0401 code after only 9k miles.
So, I've been getting P0401 code for almost two years now. The mechanic diagnosed an intermittent EGR valve sticking. That's why it went on and off. About 8 months ago I replaced it with the new EGR that I found on Amazon (suspiciously cheaper than everywhere else, just $50). The mechanic got it installed, but now, after 9k miles and 8 months, I get the same P0401 code. Did I take a stupid gamble by not paying for the $200 EGR that the mechanic was going to sell to me instead? At least he would back it up when it failed. I think it is a retorical question.
Yet, could there be any hidden reason for a new EGR valve to go bad no matter what the quality?