transmission help needed

[Bieredalsace]

still no luck with it i found someone today that wants it so i think i'm just goin to unload i really hate to see it go for just a simple problem though

I just had the same problem as rureadyto 69.
I had no trouble codes on the dash...but once I quickly accelerated uphill at a speed to pass some "sight seer"
all of a sudden my "check engine and check trans" lights started flashing. I parked it overnight for a few nights and when I started it up the same codes were still flashing. This is not the first time it happened. On a trip to Autozone, the code reader said to check the PVC valve or the wires that connect to it (Check Trans " light wasn't on that time. So I bought a $150 new EGR valve (which I have yet to install). And just as suddenly as it started the "check engine" light went out.
Someone out there has the expertise to answer this question, I'm sure. What are we to check or fix when each of these lights come on.
Thanks