He has the stock plastic BOV, so his only is efficient up to 13psi. The JDM MR DV is the absolute best choice up to 25psi. Ghoonk, I don't know what caused your problem with the CEL, but the MR DV does not do that in normal situations, and it does not have a limit of 22psi or anything.
In reference to EcuFlash, review my tutorial:
EcuFlash Setup Instructions and Tutorial