And another Subaru dealer told me it was the front wideband 02 sensor that was the problem and it was not under warranty as it had a modded exhaust
I purchased and installed Subaru OEM 02 sensor and that didn't fix it. Waste of $180 except a club member had a new STI that was broken down needing this part and a fuse. Old one got him running and he now owes me all the beer I can drink for a year.
hwy61