Question about 2005 Ford F-150

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2005 ford f150 4x4 loss of throttle at 65 mph

When driving down the road it will return too 500 rpms and will not have any throttle responce. But when you shut it off and restart it runs fine. Seem's too be intermitting

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  • Anonymous Jan 16, 2009

    i have a 2005 F-150 and i was driving down the road and the monkey wrench light came on.i hit the gas and nothing so i pull over and stop and shut it off....once i restarted its fine now the monkey wrench and engine light are on and it keeps on doing the same thing. engine light is on as well now

  • smokie396 Jan 16, 2009

    Yes the check engine light comes on.

  • smokie396 Jan 16, 2009

    the code stored in the computer is p2104 ... When i first had this problem it would stall out and i would have too restart and it was fine. So i replaced the throttle position sensor and for a month it seem fine but now it just lossing throttle but stays running at an idle untill you restart then it's fine untill it happens again .

  • Chris Hall
    Chris Hall May 11, 2010

    Do you have a check engine light?


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Have you had the check engine light read with a scanner yet? It could freatly help me diagnose this for you.

If you haven't, you can stop by most shops and have it done (it doesn't cost too awful much anymore). Or, you can buy a cheap scanner from any auto parts store (the cheaper the unit the less info it gives, but its helpful nonetheless), Or, you can swing by AutoZone or another part store that offers diagnostic scanning nfor free.

Or, you can try this:

Turn the ignition switch to the on position (without engaging the starter). Immediately after, turn the switch off, on, off and then on. Now, observe the check engine light.

The check engine light should begin to flash a series of codes. The flashes will be separated by short and long pauses. The long pauses separate the "ones" and "tens" positions, and each code from the next.

For example, for a code 55, you'll see the check engine light flash five times, followed by a short pause, then it will flash five more times. It usually repeats the code reading three times. Then, it will move to the next code.

Watch the following video for an example (a code 55 will be displayed at the end of the test).

I'll be near my computer for most of the day. Let me know what you get for codes. I suspect that it is going to be a fairly simple fix (probably the throttle position sensor or the vehicle speed sensor).

Posted on Jan 16, 2009

  • Chris Hall
    Chris Hall Jan 19, 2009

    Code 2104 isn't all that uncommon and should be a fairly easy fix. Unfortunately, it isn't all that specific either.

    The most typical causes for this code (especially when this code is not accompanied by additional codes) are a damaged PCM, a faulty APP (Accelerator Pedal Position) Sensor, or a wiring problem. Of course the other issues that can cause this code are a faulty Throttle Position Sensor or a bad Electronic Throttle Body.

    Before randomly replacing stuff based on a best guess, I'd start by simply tracking the wires between each of the above mentioned components. Make sure the connections are clean, secure and the wires appear healthy.

    Hope this helps and good luck!


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