my03 jdm sti only boosting 0.5 bar
 

I have`ent used my car for one week and now its only boosting to 0.5 bar. Its remapped to 1.5bar. would there be any reason for this? it was fine last weekend. would battery voltage effect it?. All hoses are ok with no leaks and I dont have any engine lights. Please help!

Have you accidently switched to to the low boost setting via the rear screen switch?

I did check that. Now I went for a drive in it and loaded it up 6th gear up hill went to 0.5 bar then shot up to 1.5 bar, all has been normal since then. Is this a sign of a sticking actuator?