Skip the auto shop - Our mechanics make house calls

Q: loss of power

asked by on

At hi way speed the truck just lost power l pulled over and it would not go over 1100RPMs and barely move but would Rev in neutral moved a little better in low gear but still would not go over 1100 or so RPMs

My car has 60500 miles.
My car has an automatic transmission.

Hi there. Although it’s difficult to accurately diagnose a problem like this over a computer, this sounds like your Ford Super Duty has entered "limp mode". This is a fail safe activation code that is caused by some mechanical or sensor issue found inside the transmission. It essentially locks your vehicle in low gear and controls fuel flow to ensure you can’t go quicker than 20 mph or so; allowing you to drive to the dealer for service. However, it could be other issues besides limp mode; which means you should have a professional mechanic inspect your vehicle to determine why your truck lost power.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: transmission pan continues to leak after replacing seal, took the pan off twice now will not seal?

There has to be some problem with the mating surface on the transmission or the pan and seal. If there are any pieces of the old seal on the pan, the chances the pan will leak at that spot are...

Q: Security system shut down power

The factory security system on this truck only shuts down the fuel system. This will allow the engine to crank and just not start. If there is no power at all then you have a voltage issue. If nothing turns...

Q: whAT IS THE REPAIR TIME TO DO AN OIL PAN ON A 2009 F350 6.0 DIESEL ENGINE

Hi there. It really depends on the multiple variables involved in mechanical repair such as; location where this service is performed, having access to the right tools and supplies and most importantly the knowledge and skill of the mechanic. However,...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...