I think I figured out what was wrong. I didn't wire it correctly. I am not sure if the xprog version matters. I followed the wire instruction on youtube, but it turned out it is different than the xprog I use.
Xprog I use is 6.1.2 and the xprog on youtube is something like 5.5.
After rewiring, I was able to read the dflash and write back to EEE. Will try it in my car today.
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