I have an evo 9 and last night my friend tried to flash my car but was unable to do so.

It was giving him the "Interface closed" error code. We tried it on his car and everything works just fine.

We disconnected the battery, etc , still no luck.

Any ideas?

 

Did you use the same cable and the same computer for both cars?

 

mine was just doing it ended up being the battery low on power... just charge the battery...