1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

P0420 error code 2001 Tacoma. I have some questions!

Discussion in '1st Gen. Tacomas (1995-2004)' started by irikosan, Feb 21, 2017.

?

Vacuum leak or bad cat? How much for a new cat?

  1. Tacoma, 2001, toyota

    1 vote(s)
    100.0%
  2. toyota tacoma 2001

    0 vote(s)
    0.0%
Multiple votes are allowed.
  1. Feb 21, 2017 at 11:00 AM
    #1
    irikosan

    irikosan [OP] New Member

    Joined:
    May 13, 2014
    Member:
    #129724
    Messages:
    1
    Gender:
    Male
    Bay Area
    Vehicle:
    01 Toyota Tacoma (white)
    Stock
    So the P0420 (bank 1) error code is coming up and my mechanic is telling me that one of the two catalytic converters my truck has needs to be replaced.

    Recently this morning my truck left on idle was revving on its own when stopped at the light (to about 1700RPM up and down) after driving it a few miles. When I pressed the brakes my truck engine would stutter a bit and continue revving on its own when parked. Wondering if this could be from excessive fuel trim due to a vacuum leak or a bad cat? I recently replaced my radiator. There are no coolant leaks at the moment and the 02 sensors are working just fine as well. There are some valve cover leaks but I can't seem to determine where exactly its coming from (the engine block is looking pretty dirty now due to it). Are the valve cover leaks really bad?

    Does anyone know what a catalytic converter cost would be for a 2001 toyota tacoma
    (2l na i4 double overhead cam engine)? i'm trying to figure out if I could get a good quality one somewhere wholesale price? since my mechanic is quoting me around $1400 for a new cat.


    any help would be greatly appreciated. Thank you.
     
  2. Feb 21, 2017 at 11:06 AM
    #2
    Mush Mouse

    Mush Mouse Club Soda Not Seals

    Joined:
    Apr 13, 2010
    Member:
    #35188
    Messages:
    4,761
    Gender:
    Male
    First Name:
    mush
    where ever you want me to be
    Vehicle:
    2013 SR5
    its a Toyota truck and that's all the modifications needed
    I had the same issue on an 2004, OEM Toyota cats are the best and most expensive, although the second choice would be Magnaflow which seem to work for most peeps.stay away from the Universal types cats that are welded on they creat more problems. if you search the GEN1 forum under cats you will find a lot of infos on the subject.
     
    irikosan [OP] and Dirty Pool like this.
  3. Feb 21, 2017 at 6:50 PM
    #3
    wht95scort

    wht95scort Well-Known Member

    Joined:
    Nov 9, 2016
    Member:
    #201970
    Messages:
    86
    Gender:
    Male
    NJ
    Vehicle:
    2001 3.4 gas guzzler
    Your hunting idle most likely is from a dirty or sticking idle control valve (IAC)

    As for the cat code depending on mileage history of the truck possibly having a bad misfire in the passed could have caused it to go bad. There also could be an exhaust leak letting in air passed the rear o2 causing the light to turn on. I'd have your exhaust smoked and checked for leaks first.
     
    irikosan [OP] and Mush Mouse like this.
  4. Feb 23, 2017 at 8:06 PM
    #4
    Glamisman

    Glamisman Well-Known Member

    Joined:
    Oct 22, 2016
    Member:
    #200436
    Messages:
    2,199
    Gender:
    Male
    on my 03 tacoma 375k the throttle body was just wore out and that was causing the idle to hang and then creep up... $50 wrecking yard TB and all good. try this before you replace your cat(s)
     
  5. Feb 24, 2017 at 5:38 AM
    #5
    high n mighty

    high n mighty Well versed in sarcasm

    Joined:
    Mar 3, 2015
    Member:
    #150031
    Messages:
    454
    Gender:
    Male
    Pickering Ontario
    Vehicle:
    01 DC
    Careful what you buy when it comes to a cat, california laws are pretty strict from what i understand and a univesal cat could be an automatic fail for emissions

    Bay area is cali right?
     
    irikosan [OP] and Mush Mouse like this.
  6. Feb 24, 2017 at 6:44 AM
    #6
    frizzman

    frizzman Well-Known Member

    Joined:
    Sep 25, 2013
    Member:
    #113212
    Messages:
    4,171
    Gender:
    Male
    Pittsburgh, PA
    Vehicle:
    04 XCab 4x4 TRD/OR
    OME 3", Tundra 17's, Cooper S/T Maxx 255/75-17, hitch w/ 7-pin, Leer cap, JVC head unit w/BT, LED lights
    irikosan [OP] likes this.
  7. Feb 24, 2017 at 6:46 AM
    #7
    Sandman614

    Sandman614 Snarky TWSS elf, Travis #hotsavannahdotcom, LRGRNR

    Joined:
    Oct 26, 2010
    Member:
    #45273
    Messages:
    31,663
    Gender:
    Male
    First Name:
    Tim
    Garner, NC/Boone, NC
    Vehicle:
    '06 SR5 Off Road
    ARB Front Bumper, Projector Headlights w/Slimcubby 4300K HID's, Oznium LED's, LED taillights, DIY Washable Cabin Moose Filter, Sockmonkey SR5 Off Road, Aux Audio plug, OME 886x, OME Nitrochargers, Wheelers 3 Leaf Progressive AAL, ImMrYo Rear-View Mirror Lift Bracket, Dodge D-Rings
    Cats are probably fine.. Read here
    https://www.tacomaworld.com/threads...omers-of-the-p0420-code.396763/#post-14489556
     
    irikosan [OP] likes this.

Products Discussed in

To Top