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P1135 and P0420 Codes

Discussion in 'New Member Introductions' started by jackasap, Mar 27, 2025 at 3:23 PM.

  1. Mar 27, 2025 at 3:23 PM
    #1
    jackasap

    #1
    jackasap [OP] New Member

    Joined:
    Thursday
    Member:
    #46254
    Messages:
    4
    Gender:
    Male
    First Name:
    Jack
    Virginia / North Carolina
    Vehicle:
    2002 Sr5 2WD
    Hey everyone wanna make this incase anyone had any trouble because I just went through it. Was having engine code P1135 (a/f ratio heater circuit malfunction) I have a 2002 Cali regulation 4runner. Went ahead and replaced the sensor with a Denso one (234-9002). Cool it worked … until I was driving the next day and the engine light came back on. I had figured it was the same code and maybe the sensor was bad. Checked the code again and now I was having a P0420 (bad catalytic converter) went and got the o2 sensor,
    $45 Denso 234-4261 Oxygen Sensor with 4-Wire 10” Harness for Lexus/Toyota V-6 Downstream Left/Front
    Denso 234-4261. And so far so good after I cleared the code. Will update if anything else happens. Just thought it was odd I got one code at a time.
     
    jackasap, Mar 27, 2025 at 3:23 PM
    #1
  2. Mar 27, 2025 at 5:26 PM
    #2
    BS67

    #2
    BS67 8404 USMC Doc

    Joined:
    Jan 26, 2024
    Member:
    #38143
    Messages:
    8,021
    Gender:
    Male
    CC Ne
    Vehicle:
    2023 SR5 Premium
    Welcome
     
    BS67, Mar 27, 2025 at 5:26 PM
    #2
  3. Mar 27, 2025 at 9:17 PM
    #3
    DesertSurfer

    #3
    DesertSurfer It ain’t bragging if you can do it!

    Joined:
    Jun 6, 2023
    Member:
    #33284
    Messages:
    1,797
    Gender:
    Male
    First Name:
    Gary
    San Diego
    Vehicle:
    2024 T4R ORP w/KDSS Underground
    Glad you sorted things out like you did and then posted it, thanks. Welcome to the forum!
     
    DesertSurfer, Mar 27, 2025 at 9:17 PM
    #3
    jackasap[OP] likes this.
  4. Mar 28, 2025 at 2:03 AM
    #4
    Steely123

    #4
    Steely123 What's the new trend? I'll do it!

    Joined:
    Jun 4, 2022
    Member:
    #27323
    Messages:
    3,864
    Gender:
    Male
    TX
    Vehicle:
    2018 4runner SR5 premium
    Welcome
     
    Steely123, Mar 28, 2025 at 2:03 AM
    #4
  5. Mar 29, 2025 at 12:24 PM
    #5
    Ironguy

    #5
    Ironguy Kind of New

    Joined:
    Dec 22, 2019
    Member:
    #12421
    Messages:
    7,537
    Gender:
    Male
    First Name:
    Ralph
    Bisbee AZ
    Vehicle:
    2020 Black 4Runner Venture 1967 FJ40 Land Cruiser
    New pine scent hanger, new sun shade
    Welcome from Arizona!
     
    Ironguy, Mar 29, 2025 at 12:24 PM
    #5
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Products Discussed in

Denso 234-4261 Oxygen Sensor with 4-Wire 10” Harness for Lexus/Toyota V-6 Downstream Left/Front
$44.99
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