1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2018 Prius gen 4 heat exchanger issue

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Patar, Nov 18, 2024 at 8:10 PM.

Tags:
  1. Patar

    Patar New Member

    Joined:
    Yesterday
    1
    0
    0
    Location:
    Sacramento
    Vehicle:
    2018 Prius
    Model:
    N/A
    I’m sorry I accidentally posted on the gen 3 forum instead and I don’t know how to remove that post.

    Hello as this title states I have a coolant burn up issue that goes into the heat exchanger. I have to fill up on coolant constantly. I get only a temp light for low coolant but I don't have a check engine light.

    Toyota dealership only has a California 150,000 emissions warranty if I have a check engine light. I'm at 115,000 miles.

    Question: Should I wait until my check engine light comes on (would this affect my vehicle negatively) or replace the catalytic converter which costs $2400 from the dealership?

    I just find it backwards that I have to ruin my car to get my issue covered and I'm worried that I will have further issues. Just trying to find reassurance that by doing this I won't actually make bigger problems.
     
    #1 Patar, Nov 18, 2024 at 8:10 PM
  2. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    1,845
    937
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    NO, dealership is requited to fix it - it's part of your emissions system. No CEL is required, just a proper diagnostic. Ask to speak to their service manager. Tell him/her that your going to call Toyota corporate, Cal EPA, BAR, and consumer protection agency on them if they don't fix it. OR just try another dealership.
    You've got Maita-, Roseville-, Elk Grove-, and Folsom Lake- Toyota within Sacramento.
    Do not wait; you may damage the engine. The heat exchanger is behind the CAT and sold as a single unit part. There's a TSB out for the 2016-2017 model years, but your still under emissions warranty.

    Good Luck....

    You should tell the dealership person that they are responsible for any further damage to the power train, because they told you to keep driving the car until it throws codes. I hope you got that in writing.
     
    #2 BiomedO1, Nov 18, 2024 at 11:11 PM
    Last edited: Nov 18, 2024 at 11:25 PM
(You must log in or sign up to post here.)