Question about 2005 Ford F-150

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A wrench lit up on the dashboard. looking at my book it said engine has defauted to a limp home operation. What does this mean? thanks leon guillot

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Limp home operation is when the PCM detects a severe transmission problem. The PCM limits the transmission operation to try and prevent damage. A lot of people say that limp home is only a certain gear, but that isn't correct. The PCM decides what the trans can still do with the failure that it has, and uses what is still usable.

An example of limp home would be if the PCM detected that the pressure control solenoid that operates the overdrive clutch didn't work. In that case 2nd and 5th gears wouldn't work, so the trans will shift 1-3-4, since that's all that it can do.

I hope this answers your question.

Posted on Oct 05, 2009

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