Question about 2005 Ford F-150

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I've got a 2005 Ford F-150 5.4 L and it's been going into Engine: Failsafe mode for several months. Dealer could not get any codes off of it. This last time my check engine light also came on and the dealer now says I have a bad "Throttle Body". I've researched this a bit and from what I can tell it's more likely to be just the throttle body sensor, not the whole throttle body. They want to charge me $528 for the TB. Suggestions?

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Hello, you are probably right. If you go to, you can look up more about TSB's for your Year truck. One thing you may try before purchasing the new part is to bring a Multitest meter to the parts store and see if the values of your old part are different than the values of a new part. ( Before you leave the parts counter.)

I can not say if there are more than 2 wires on your part to test, but I do not think it is much more than a regular Throttle Position Sensor. They are just a variable resistor and if the contacts get worn inside you could have the problems you describe.

When you review the Website I mentioned, look up the Code for Failsafe operation and compare the TSB's on the Website. Remember, a TSB can be a free repair.

I hope my solution is very helpful to you and that you fix your truck.

Posted on Apr 05, 2011

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