Trouble Code P1126?

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Thread: Trouble Code P1126?

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    Default Trouble Code P1126?

    My 2001 Tundra V8 has been throwing a Check Engine light on and off for a few days. Seems to run and drive normal. I hooked up a coworkers OBDII scan tool and came up with P1126=Manafacurer fuel and air measurement. But when looking up P1126 in the search function of this forum, I would see Magnetic motor or TPS? Would the P1126 from the scan tool be the same trouble code as Toyota? Runs great otherwise!
    2001 Toyota Tundra V8 accesscab 2wd
    2005 Toyota 4runner Sport V6 4wd
    1992 Ford Mustang 560rwhp

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    Default Re: Trouble Code P1126?

    From Alldata:

    Magnetic clutch is mounted between the throttle motor and the valve, and it connects the throttle motor with the throttle valve. Therefore the throttle motor opens and closes the throttle valve through the magnetic clutch.

    If the electric throttle control system has a malfunction, the magnetic clutch separates the throttle motor from the throttle valve so that the throttle motor cannot operate the throttle valve.

    If this DTC is stored, the ECM cuts the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.


    That doesn't help you much for the diagnosis, but it does tell you what is going haywire.

    The first thing I would do is measure the resistance between pins 3 and 4 of the magnetic clutch circuit. The resistance should be between 4.2 and 5.2 ohms. If it is either open or shorted, there is your problem.

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    Default Re: Trouble Code P1126?

    So when the malfunction occurs I would not feel anything wrong? I honestly do not notice any difference, feels normal. Later this afternoon the check engine light turned off, but still receive the code p1126. I cleared the code and will check tomorrow.
    2001 Toyota Tundra V8 accesscab 2wd
    2005 Toyota 4runner Sport V6 4wd
    1992 Ford Mustang 560rwhp

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    Default Re: Trouble Code P1126?

    Quote Originally Posted by mitsu matt View Post
    From Alldata:

    Magnetic clutch is mounted between the throttle motor and the valve, and it connects the throttle motor with the throttle valve. Therefore the throttle motor opens and closes the throttle valve through the magnetic clutch.

    If the electric throttle control system has a malfunction, the magnetic clutch separates the throttle motor from the throttle valve so that the throttle motor cannot operate the throttle valve.

    If this DTC is stored, the ECM cuts the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.


    That doesn't help you much for the diagnosis, but it does tell you what is going haywire.

    The first thing I would do is measure the resistance between pins 3 and 4 of the magnetic clutch circuit. The resistance should be between 4.2 and 5.2 ohms. If it is either open or shorted, there is your problem.
    Thanks for explaining! Will measure tomorrow!
    2001 Toyota Tundra V8 accesscab 2wd
    2005 Toyota 4runner Sport V6 4wd
    1992 Ford Mustang 560rwhp

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    Default Re: Trouble Code P1126?

    Still no check engine light. Hooked up the scanner anyway just to check and there is no codes so far.
    2001 Toyota Tundra V8 accesscab 2wd
    2005 Toyota 4runner Sport V6 4wd
    1992 Ford Mustang 560rwhp

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    Default Re: Trouble Code P1126?

    .........
    Last edited by ToyotaTruck; 03-04-2011 at 06:23 AM.

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    Default Re: Trouble Code P1126?

    Ditto me having intermittent code P1126, but truck not being placed into limp-home mode on my 2000 Tundra with 4.7L. Wondering if this is a sign the ECU is bad? Costly troubleshooting in this arena!

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    Default Re: Trouble Code P1126?

    hi, since i joined i have seen so many codes.
    is there a web site, a book, etc,
    where we all can get them, for our specific toy?
    just wondering.
    i surely know 1 thing, that everyone of us, that has a or has had a code,
    we thankyou all, for the knowledge of what that specific code is for.
    :-))))))))))))
    gorilla

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    Default Re: Trouble Code P1126?

    P1126 Code For Toyota Tundra Limited

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