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p0420

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  1. Prius2006GuitarGuy
    Thread

    How to erase P0420

    Hey! I have a AP200 and got a P0420 code, I am going to try two tricks one after the other to try to fix it: 1 - clean the cat via "Liqui Moly...
    Thread by: Prius2006GuitarGuy, Oct 5, 2024, 16 replies, in forum: Gen 2 Prius Main Forum
  2. Prius2006GuitarGuy
    Thread

    Just OBD'ed my Prius and got 4 errors...

    Hey guys! Just got my Autel obd2 scanner, ran the diagnostics and this is what I got : [ATTACH] [ATTACH] [ATTACH] [ATTACH] [ATTACH] I could...
    Thread by: Prius2006GuitarGuy, Sep 26, 2024, 9 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  3. Mattdr28
    Thread

    Cat Converter Problem in 2008 Prius II

    My cat converter was stolen about 3 years ago and I had it replaced with after market kind. About a month ago the check engine light code came on...
    Thread by: Mattdr28, Jul 17, 2024, 3 replies, in forum: Gen 2 Prius Main Forum
  4. maleko
    Thread

    P0101 + P0420 -- How linked are these?

    While performing my recent inverter swap I went ahead and replaced my PCV valve (old one was still rattling, albeit a bit gunked up), cleaned my...
    Thread by: maleko, Jul 2, 2024, 2 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  5. Kaip123
    Thread

    P0420 and engine life

    Hello, I’ve been lurking for over a year but am new to posting. I recently posted a diagnosis question and got some good feedback and figured I’d...
    Thread by: Kaip123, Jun 10, 2024, 4 replies, in forum: Gen 2 Prius Technical Discussion
  6. Mattdr28
    Thread

    Check Engine Light (P0420 code) on and then goes off

    I was driving my 2008 prius yesterday and noticed the check engine light was on. I hooked up the OBD reader and got a code for P0420. Today I...
    Thread by: Mattdr28, May 9, 2024, 8 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  7. alancosta
    Thread

    a lot of error codes for my 2007 Prius, frustrated!

    Hello everyone, I am writing this post to seek information from you about some issues I am facing. About 2.5 years ago, I bought a 2007 Prius...
    Thread by: alancosta, Feb 1, 2024, 11 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  8. MisterMilox01
    Thread

    P0420- Cat is dead, need a plan of action

    Hi all, I’ve been troubleshooting (I mean, sitting on) a problem with my cat for awhile now. I’m running a ‘07 Prius with 300k miles on the...
    Thread by: MisterMilox01, Aug 12, 2023, 10 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  9. Bruce_Rmz
    Thread

    How to access the intake manifold?

    I came across a post to solve the P0420 code using a spray can, and I would like to give that a try. However, the person who posted that article,...
    Thread by: Bruce_Rmz, Jun 2, 2023, 4 replies, in forum: Gen 2 Prius Technical Discussion
  10. Riverhook
    Thread

    P0420 code Gen 3

    I have a p0420 code have replaced both o2 sensors, mass airflow sensor, all 4 coils and plugs. Most were replaced before the code just in self...
    Thread by: Riverhook, Apr 23, 2023, 4 replies, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
  11. JakeO
    Thread

    Curse you, Emissions!! - p0420, p0137

    I failed emissions in Illinois due to p0420 and p0137. I had my cat stolen about 2 years ago and replaced with an aftermarket. Steps taken so far:...
    Thread by: JakeO, Mar 17, 2023, 7 replies, in forum: Gen 2 Prius Main Forum
  12. JakeO
    Thread

    P0420 - Sensor Extender a Good Option or no?

    Hey y'all. P0420 on my 2007 Gen 2 found at emissions testing in Illinois. Aftermarket cat was installed after mine was stolen about 2 years ago....
    Thread by: JakeO, Jan 5, 2023, 3 replies, in forum: Gen 2 Prius Technical Discussion
  13. pri4u
    Thread

    Could I sue my mechanic for potentially installing an aftermarket catalytic converter?

    Hello, My Toyota Prius 2008's Catalytic Converter was recently stolen for second time in the last couple of years. I have full coverage insurance...
    Thread by: pri4u, Nov 21, 2022, 84 replies, in forum: Gen 2 Prius Main Forum
  14. Hanging on with 286k
    Thread

    299,000 miles: multiple codes

    P0172, P0300, p0301, p0302, p0304 P3191 and P3193 Hello. Multiple codes were pulled in June when I thought red triangle was the Hybrid Battery....
    Thread by: Hanging on with 286k, Nov 7, 2022, 8 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  15. japeda
    Thread

    Diagnosing p0420 and loss of power

    I've gleaned so much info from these forums over the years I've never had to make an account but here we go. Thanks everyone for your previous...
    Thread by: japeda, Oct 21, 2022, 11 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  16. fkat
    Thread

    P0420 diagnosis

    Yet another P0420 thread but bare with me. I read so many threads here about P0420 and other emission threads and very thankful for a wealth of...
    Thread by: fkat, May 2, 2022, 8 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  17. NoThrowningRocks
    Thread

    INCREASING 02 STORAGE B2 to Pass Emissions

    For the first time my 2006 Prius with 177k miles failed an emissions test :(. P0420 and P0A93-346 were the culprits. Brought it to a mechanic who...
    Thread by: NoThrowningRocks, Mar 1, 2022, 1 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  18. DodgeTransmissionsGoBoom
    Thread

    06 prius 113k miles with dreaded p0420 code

    I recently bought an 06 prius with what i thought just needed a HV battery but turned out to need a battery and inverter but a few days later i...
    Thread by: DodgeTransmissionsGoBoom, Aug 30, 2021, 2 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  19. Bryce Paige
    Thread

    Bought a 07 Prius, first I got a CEL, now the red triangle of death.

    Just bought an 07 Prius last week. Drove fine on the test drive and I got no engine codes when I did a full scan of the system with my BlueDriver...
    Thread by: Bryce Paige, Aug 16, 2021, 3 replies, in forum: Gen 2 Prius Technical Discussion
  20. k1ngn0thing
    Thread

    can P0446 cause P0420?

    Car's had P0420 for a while, and recently noticed P0446, and I'm wondering if it was there before and I may have missed it. Can an evap issue also...
    Thread by: k1ngn0thing, Jun 26, 2021, 10 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
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