I wouldn't be much of a Sprinter mechanic if I didn't bring my own diagnostic equipment, now would I?
And the DAD says...... EGR valve. I already removed and cleaned it, and it wasn't bad at all. But it's still throwing the same code. I guess the egr motor didn't like to be sitting for over a year....
But because the valve still closes and stays closed, it's a perfect candidate for an egr bypass.
Yes. It does exist. And yes, it does work. I haven't gotten it to work on every Sprinter I've tried it on, but I've had it work 100% of the time on 2004s. And this is a 2004. I'll update the forum tomorrow. But things are looking good for leaving Mexico early Saturday morning.