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2003 Toyota Tacoma Dbl Cab Prerunner 3.4L V6 Check Engine Light. P2121

Discussion in '1st Gen. Tacomas (1995-2004)' started by WhiteTacoBirria, Nov 5, 2023.

  1. Nov 5, 2023 at 7:27 PM
    #1
    WhiteTacoBirria

    WhiteTacoBirria [OP] Member

    Joined:
    Oct 20, 2022
    Member:
    #408503
    Messages:
    15
    Vehicle:
    '03 White Taco Pre-Runner V6 2WD
    Hello everybody,

    Check engine light came on and truck went into limp mode after coming to a stop and then entering a right turn. Pulled over, turned off the truck and turned the truck back on and limp mode went away. No fluids leaking from the bottom and no weird sounds so I drove home since I was down the street from my house anyways. I pulled the code and got P2121 - Throttle/Pedal Position Sensor. I went ahead and replaced the Throttle Position Sensor, it was a 4 pin sensor, part# TPS4-35030 or 89452-35030. Old one seemed fine honestly, it wasn't gunked up and rotated fine when I took it off. I put in the new one just to make sure and took it out for a spin around town. It drove fine until I came to a stop and turned left. The RPMs dropped briefly while I tried to throttle, the truck struggled then revved up and accelerated. I continued driving it around town about 20 more minutes doing errands and it seemed okay until my low fuel light turned on despite having half a tank. The fuel light came on before a couple weeks ago too while I was driving along the highway but went away after 30 minutes of driving. I didn't think much of it now, but do either problems involve each other? Any insights would be greatly appreciated. Thank you in advance.
     
  2. Nov 5, 2023 at 7:42 PM
    #2
    O'Silver_Taco

    O'Silver_Taco Well-Known Member

    Joined:
    Aug 26, 2021
    Member:
    #375390
    Messages:
    4,128
    Gender:
    Male
    First Name:
    MD
    Vehicle:
    98 Dlx Sr5 ext AT Rwd
    3rz to 2Rz bebuilt block and new heads

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