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P0420 P0320 and P2121

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Nalpak99, Jun 14, 2025.

  1. Jun 14, 2025 at 9:05 AM
    #1
    Nalpak99

    #1
    Nalpak99 [OP] Booty Hunter

    Joined:
    Mar 17, 2020
    Member:
    #322343
    Messages:
    259
    Gender:
    Male
    First Name:
    Kyle
    Vehicle:
    2005 Toyota Tacoma pre-runner
    mid travel
    For my Tacoma I’m getting engine codes: P0420 P0320 and P2121
    I’ve had P0420 and P0320 for a while. Not really worried about them as I think I just need new cats but my state doesn’t smog. P2121 puts the truck into limp mode. It seems to happen when I step on the gas a lot.

    P0420 P0430 P2121
     
    Nalpak99, Jun 14, 2025
    #1
  2. Jun 14, 2025 at 10:53 AM
    #2
    Dm93

    #2
    Dm93 Test Don't Guess

    Joined:
    Mar 3, 2015
    Member:
    #150066
    Messages:
    13,299
    Gender:
    Male
    Texas
    Vehicle:
    2014 DC OR 6spd 4x4
    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    The P2121 is an issue with the Accelerator Pedal Position (APP) Sensor/circuit, either the sensor is failing or you have a wiring issue. The sensor is integrated into the accelerator pedal and consists of two independent sensors (VPA & VPA2), when the two sensors do not agree the ECM sets P2121, enters failsafe mode, and limits throttle angle.
     

    Attached Files:

    Dm93, Jun 14, 2025
    #2
  3. Jun 14, 2025 at 10:55 AM
    #3
    Nalpak99

    #3
    Nalpak99 [OP] Booty Hunter

    Joined:
    Mar 17, 2020
    Member:
    #322343
    Messages:
    259
    Gender:
    Male
    First Name:
    Kyle
    Vehicle:
    2005 Toyota Tacoma pre-runner
    mid travel
    I’m going to unplug my pedal commander. I think it’s messing with it
     
    Nalpak99, Jun 14, 2025
    #3
  4. Jun 14, 2025 at 10:56 AM
    #4
    Dm93

    #4
    Dm93 Test Don't Guess

    Joined:
    Mar 3, 2015
    Member:
    #150066
    Messages:
    13,299
    Gender:
    Male
    Texas
    Vehicle:
    2014 DC OR 6spd 4x4
    Predator tube steps, Ranch Hand grill guard, Magnaflow CatBack exhaust, Toyota tool box & bed mat, 2LO Module by @Up2NoGood, Rearview Compass/Temp Mirror, Tune by @JustDSM.
    That could definitely be causing it.
     
    Dm93, Jun 14, 2025
    #4

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