2016 Prius Check Engine Light – P0456 Code

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Alyssa L, Feb 25, 2026 at 5:19 AM.

Tags:
  1. Alyssa L

    Alyssa L New Member

    Joined:
    Jul 8, 2025
    2
    0
    0
    Location:
    Los Angeles
    Vehicle:
    2017 Tesla Model S
    Model:
    Plug-in Advanced
    Hi everyone,

    My 2016 Prius just showed a check engine light. The car seems to run fine.

    I scanned it with my Autel MK808Z and got P0456 (EVAP small leak detected).

    Has anyone dealt with this before?
    Should I start with the gas cap or check something else first?

    Any advice would be appreciated. Thanks!
     
    #1 Alyssa L, Feb 25, 2026 at 5:19 AM
(You must log in or sign up to post here.)