I bought 4 struts to move from air to coil. But module is too expensive. How can I Get rid of the Suspension Fault message, please.

 

Read the codes, diagnose the problem, go from there. The arir suspension is quite good.

 

by switching from air to coils you have induced a "suspension fault" and without the module you can not make the message go away. Sorry but that's how it is.
Yes the EAS can be a PITA. I'm argiung with mine now in fact. Still, I'm not going to coils.