I see that there are other postings for a CEL 420 but most of them talk about adding a resistor for the fix. I would rather do it the right way. I just got a 02 WRX. It had a 4" catless down pipe, a Magnaflow exhaust and a turbo XS BOV. I was having after fire problems so I went back to a stock BOV and replaced the cheap intake with a K&N Typhoon. The next day I got a CEL 420 with a 546. I was about to get a cobb access port and take it to a stage 2 but don't want to waste the money if I need to go another way. Anyone have any ideas??????