Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › P2404 code on 2018 subaru crosstrek › Reply To: P2404 code on 2018 subaru crosstrek April 16, 2020 at 9:42 am #954295 Richard KirshyParticipant For a evaporative emission system leak. Consider smoke testing the system first to locate the source.