Wrench symbol=limp home?

[cRaZy8]

Today, on the highway at about 80, tranny almost seemed liked it slipped a little. Wrench symbol came on. Stayed on while doing 70-80 for the next two miles. Got off the exit, I drove normal for the next two min, parked the truck and went into my USCG class.

I brought the owners manual in with me, and it says the wrench means it is an accelerator sensor malfunction, and to bring it to the dealer. Well, I had a break in the morning, no wrench, drove fine.

Went to lunch, no wrench, drove fine.

Drove home on the highway, 70mph or so, no wrench, drove fine.

About a month ago, after I got my FICM replaced at the dealer (along with all new flashes to PCM, TCM, and FICM), I had a similar incident. I was coming back from snowmobiling in VT. Had my sled in the bed of the truck, not in tow mode. The tranny did this same hiccup/slip once maybe twice during that ride, but no wrenc symbol.

Should I be concerned, I feel like I should be? Is this a sensor that is ready to quit on me and leave me stranded? Truck hasnt missed a beat since my FICM replacement.

See my sig, no tuner. EGR delete- including sensor.

I searched for limp mode issues, all that came up were guys that were restricted on speed, or stuck in a certain gear etc.

Any ideas?

[cRaZy8]

Nobody else ever had a wrench symbol pop up on their dash?????

[Louder Whistle]

ya i had this problem with my 08 F550

[brewmaster gerber]

if you have a chip unplug it. could be loose connection or chip is bad. had this on my truck just unplugged chip and plugged back in no probs since

[T diesel]

Yea I had it.
There is a code set. Have it read.
Mine was turbo overboost which = head gaskets which= $$$$$$$$

[clemsonjeep1]

It could be several problems...anything from the difference between your ECT and EOT being too great to an overboost from the turbo or whatever else Ford set it to come on for but those two are the major ones I've heard about.