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.

A: Hi there. Although it’s difficult to accura...

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: Spark plugs blowing out

Hi the problem could be stripped threads in the head. Old threads must be tapped and cleaned up. Insert the Helical to ensure the new threads are parallel with the originals. Continue tapping and threading the new oversize threads. Coat...

Q: Car won't start

Hello. This can be caused by a number of things. If the engine is not cranking then you may have a key issue or more commonly a failure in the electronic ignition switch. Also, the battery should be load tested...

Q: Smoke blows from tail pipe

If you are getting excessive pressure build up in the crankcase, then you may have a clogged crankcase breather system. If the breather system is clean, then you may have a broken piston ring causing the buildup. Have the breather...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...