Chasing a P0301 code

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by MichaelB126, Jun 17, 2026 at 8:47 AM.

  1. MichaelB126

    MichaelB126 Junior Member

    Joined:
    Sep 26, 2023
    3
    1
    0
    Location:
    Phoenix
    Vehicle:
    2008 Prius
    Model:
    N/A
    I've been chasing this for a while. Previously, recently changed maf sensor, fuel injectors( beck arnley), and catalytic converter. Separate unrelated issue, dash cluster not working, i think its the known capacitor issue prius' have.

    On way to work this morning, while driving car shutters. Check engine light was on then flashing. Checked on Dr prius app. Said P0301. Reset code. Shuttering continues.
    Any guidance is greatly appreciated. Im stuck. Thanks
     
    #1 MichaelB126, Jun 17, 2026 at 8:47 AM
  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,922
    8,634
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    If you have a code P0301 and you reset the code. It does not magically fix itself. You need to dig deeper to see what's causing that code and change the necessary parts to correct it
     
    #2 JC91006, Jun 17, 2026 at 11:15 AM
  3. MichaelB126

    MichaelB126 Junior Member

    Joined:
    Sep 26, 2023
    3
    1
    0
    Location:
    Phoenix
    Vehicle:
    2008 Prius
    Model:
    N/A
    I understand. Any thoughts on what else I could look at?
     
    #3 MichaelB126, Jun 17, 2026 at 11:25 AM
  4. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
    Oct 17, 2010
    61,299
    42,165
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Google's AI is telling me a flashing check engine light is more urgent, and to stop driving immediately.

    Just editorial: it's "shuddering", not "shuttering". :)
     
    #4 Mendel Leisk, Jun 17, 2026 at 11:53 AM
  5. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,922
    8,634
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    Last time I encountered a flashing check engine light, the problem was a broken spark plug. You should check cylinder 1 on your car
     
    #5 JC91006, Jun 17, 2026 at 1:10 PM
(You must log in or sign up to post here.)