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p0420

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  1. 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, 9 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. ydpplqbd
    Thread

    P0420 - MID: $21 TID:$a9 Result from Torque App

    2006 Prius with almost 250k miles. Minimal oil burning (anout one-half quart every 3000 miles). About 25k miles ago, my Gen2 started throwing...
    Thread by: ydpplqbd, Jun 2, 2021, 11 replies, in forum: Gen 2 Prius Technical Discussion
  15. 1fixitman
    Thread

    2005 Prius P0810 and red triangle 191K miles

    I have a Red triangle and code P0810 and P0420. Before I get into this I want you to know that I have always done all the maintenance to this...
    Thread by: 1fixitman, May 28, 2021, 5 replies, in forum: Gen 2 Prius Main Forum
  16. ydpplqbd
    Thread

    P0420 Tripped Only When Coolant Temp Getsto 175F

    P0420 tripped only when coolant temp gets to approximayely 175F. I have 2006 Prius with mo other codes. I believe 175F is when computer goes...
    Thread by: ydpplqbd, May 15, 2021, 8 replies, in forum: Gen 2 Prius Main Forum
  17. mdoprius
    Thread

    P0420 reading

    [ATTACH] Check engine light came on for the first time since I bought the car. P0420: Catalytic Converter code. I’m wondering if it could be...
    Thread by: mdoprius, Apr 26, 2021, 9 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  18. ediblestars
    Thread

    P0420 light has been coming on and off intermittently and now it's state inspection time. Help?

    I have a 2008 Prius. In August 2019, I was driving across the country when my check engine light came on. I had it read, and it was P0420....
    Thread by: ediblestars, Dec 15, 2020, 3 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  19. Bacon_Is_A_Pooper
    Thread

    Timing chain replacement and other codes, parts lists or general info/help

    Hello, I have a '04 gen 2 Prius reading code p0016, P0420, and P1121. I know what the codes are for, I have a replacement pump already from a...
    Thread by: Bacon_Is_A_Pooper, Nov 3, 2020, 18 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
  20. vk1
    Thread

    2002 Prius, P0420, 37.4MPG, Misfires, High RPM

    Hello All, I decided to make a new thread for the issue at hand. This is the continuation of this thread about purchasing the car: Prius Gen1 -...
    Thread by: vk1, Aug 16, 2020, 9 replies, in forum: Generation 1 Prius Discussion
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