it could do depending on the fault it maybe throwing it into limp mode? (never had engine light problem my self) what the max boost your seeing atm? and what boost is your ebc set too??
firstly: is the EBC plummed in correctly? is the ebc setup properly? what pressure is your actuator rated to? as the boost controller will only increase boost from that point when set up Pictures help Peter
Looking good mate I love 1A0 glanzas!! I'd change those alloy wheel nuts to steel (if they are ally) as they will stretch and come loose easily . But it's looking good! What's next?
Oil temp as that's what you want up to temperature not just your water but if you can I would go boost, oil temp, oil pressure and water temp as the stock water gauge is gash!
If your going ebc I'd speak to TD as the boost curve will be different to the one it's mapped for, just a thought And socks is right it all depends on engine condition and mechanical fatigue
For the hassle you would go throught to lower them you be better off buying recaros or something similar and making rails as its a ball ache but in answer to your question there are no quick fixes
if money is tight, fuel pressure regulator and FCD and get it setup on a RR, But the berst advice is what John has suggested^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^