On about 5k miles from an engine rebuild by subaru (covered under warranty). Had them replace timing and plugs while in.
Threw P0021 and Misfire in cylinder 4 about 4 weeks ago. Changed the oil right after as it was coming up due, after the first breakin change. Now threw P0021 on my drive home. Cars running completely fine. Now all the reading on P0021 seems to be on older WRXs, so I was wondering what I should do with this? Does mine have Banjo filters? I have yet to pull the cover to check the timing, but considering how my cars running, I figured it was fine.
Also, if this something with timing, is there some type of warranty on subaru work they do? Guess this is a question for the dealer.
Heres the code. For some reason came up with 3.