Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2003 Lancer P0456 › 2003 Lancer P0456 October 3, 2011 at 11:00 am #438853 dreamer2355Participant +1 on the smoke machine and bi-directional scan tool. You could try doing a thorough inspection of the EVAP system and components and see if it yields any results.