really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
42,781 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Ford F-150 engine problems

engine problem

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2011 Ford F-150 Owner Comments (Page 4 of 17)

« Read the previous 20 complaints

problem #276

Jun 022015


  • miles


I have taken my truck back while under warranty they never could find anything, but it had a mis when I would get on the gas. It never really stalled out but would jump pretty good, never seemed to run really smooth. I keep telling the dealer to please check out. I give up and keep driving the truck and now that its out of warranty they find that its something to do with variable camshaft and going to cost $4,400 to fix not counting the other things I having to pay for that was taken back while under warranty. From the day I bought the truck water has been in the passenger floor board and now they tell me, its the heater box need replace at a cost of $1,400 strange they can find all this now that I have to pay for it. My truck had to be parked due to this and I now have to figure out if I want to invest any more money in a truck or just junk what should be a truck worth $30,000

- Burnsville, NC, USA

problem #275

Nov 012015


  • 81,000 miles
Under acceleration or trying to pass a vehicle loss of power has been occuring. Trying to accelerate into interstate from on ramp have had power loss and vehicle loses all acceleration.

- Mobile, AL, USA

problem #274

Nov 032015


  • 78,069 miles
While accelerating on to the highway on a clear, warm, sunny day; the turbo engaged and the truck began to shudder. There was immediate deceleration and the check engine light began to flash. After easing up on the throttle and coasting, the light turned off and the truck began operating normally. This occurred within 1-mile of travel. I was unable to replicate the issue on the remainder of the drive. This is a major safety concern as the speed of the vehicle drops dramatically in a short distance and the vehicle is unable to recover rapidly, leaving the vehicle's occupants susceptible to potentially catastrophic accidents on the roadway.

- Burleson, TX, USA

problem #273

Oct 272015


  • 98,000 miles


Eco boost engine. Problem has occurred several times. Problem has occurred when rapidly pulling away from a toll booth after several hour of continuous interstate driving in the rain (occurred 10/2013 and 10/2015). Problem has occurred when trying to pass another vehicle on a 2 lane road under the same type of rainy conditions (occurred 10/2015). Engine will shudder and go into limp mode. Truck was taken 2 years ago to the Ford dealership for repair of this problem. Two events occurred this past week under rainy conditions. Truck is now out of warranty and still not fixed.

- Clemmons, NC, USA

problem #272

Oct 262015


  • 53,000 miles
On October 26 was on my way to work I was on loop 250 which is 60 mph. Got on the loop was approaching an over pass when suddenly with no warning lights it starts jerking, a pulling, shaking. Took foot off gas pedal looked at dash no warning lights on but the speedometer and gears on dash were going crazy going up and down. Slowing down applying the brake slowly cause lots of traffic behind and I front of me. I was shaking and very upset finally pulled over and turned truck off called my husband I told him what happened. He asked if the truck turned on it did I took it to dealership going very slow. My husband met me there and I told them what happened. I was very shaken up almost in tears. This is a saftey issue im like what if the truck would have caught one of those gears when it was going up and down from 1-6 or reverse I would have flipped that truck. Please please investigate this problem before it happens to someone else and is hurt or killed. It is Nov 1 and they still have not even diagnosed my vehicle. I want it fixed correctly but 1 week and not even looked at yet. That is my only vehicle and it's been very inconvenient getting to work.

- Midland, TX, USA

problem #271

Oct 262015


  • 53,000 miles
On October 26 at around 1230 pm I was going the speed limit 60 mph. On loop 250.all of a sudden my truck starts jerking really hard. I let go of the gas and looked at the dash the speedometer and gears were going crazy up and down. I was able to pull over safe cause it was lunch hour lots of traffic. Turned truck off was shaking, scared and very upset. Called my husband told him what happened asked if I was ok I said yes besides very shaken up. He said it might be the transmission or tcm. Started the truck went slow to dealership. This was very traumatic experience I'm thinking what if the gears would've gotten stuck or reverse and I would've rolled. Please look into this cause it was very scary.

- Midland, TX, USA

problem #270

Oct 262015


  • 65,200 miles


Reference 2011 Ford F-150 ecoboost: Was driving on the expressway at highway speeds and slowed to about 30mph for heavy traffic. When I began to increase speed truck began to shudder and the "check engine" light came on. Started to pull toward the right shoulder from far left lane, when the engine stalled completely and had to roll without power to the shoulder. The truck/engine continued to limp to the dealer. This is the 8-9th time I've experienced this problem and the truck has left me and my kids in a dangerous situation on the interstate. To add insult to injury, each time this happened, the dealer hit me with the $100 diagnostic fee even though the truck is under warranty. All tsb's have been done and nothing has fixed the problem and actually has made matters worse by the dealer "reflashing" the truck and killing the avg. Mpg. It is well known that the issue is with the intercooler and will have future major effects on the cat converter and turbos as well as carbon issues in the rear cylinders. The truck is in the shop at this moment and I am awaiting the dealers call. Ford has done nothing to remedy this unsafe problem, that puts myself, my family and others at risk. Btw, I have replaced the coils and spark plugs 4 times since the problem started at about the 34-36K mile mark.

- Mokena, IL, USA

problem #269

Sep 302015


  • 65,000 miles
The low oil pressure light comes on when the oil is full. Saying oil pump low pressure. This started about 4 weeks ago. It seems to only do this when RPM's are 1200 and below.

- Prairieville, LA, USA

problem #268

Oct 082015


  • 74,500 miles
While driving on interstate my vehicle started to miss fire and lose power. I was hauling a horse trailer going approximately 60 mph with large 18 wheel vehicles when the engine started miss firing and loosing power. Was able to get off interstate and find a local Ford dealership. While driving to Ford dealership the check engine light continued to flash, I finally lost all power and the truck shuddered and flashers automatically went on, was able to get to dealer ship and was diagnosed with bad #4 coil. This was replaced under warranty with a $100 deductible and 6 days later same thing happened, again while hauling horse trailer on interstate, same issues with loosing power, check engine light flashing and truck shuddered. Again was lucky enough to make it to a local Ford dealership, this time #6 coil was diagnosed as being bad. This was changed under warranty with another payment of $100 deductible. Because this happened twice while hauling my horses, and I had another 400 miles to go before reaching my final destination, I could not take the risk of this happening and loosing power while driving on interstates with 18 wheel vehicles at 60 mph and figure I might get lucky a third time and not be killed because an 18 wheeler couldn't stop or avoid hitting me when loosing power from 60 mph to 30 mph, I chose to have the other 4 coils replaced. After getting home I did some research and see this is under investigation with NHTSA and wanted to report the same issue. The other 4 coils I had replaced were not covered under warranty and now I find out that possibly that wasn't the issue but most likely moisture accumulation in intercooler system of truck. I'm concerned I don't have a truck that can be depended upon to keep me and my animals that are being transported in horse trailer safe.

- Hartly, DE, USA

problem #267

Oct 042015


  • 46,447 miles
Accelerated to merge onto the highway. Truck suddenly lost all acceleration and began to shake. Engine light came on. Deceleration was as sudden as if I had slammed on my brakes. Coasted to the side of the highway and turned of the truck. After a few minutes of me shaking, I restarted the truck. Engine light was still on, but truck drove normally as long as I "crept" up to speed.

- Arlington, TX, USA

problem #266

Sep 132015


  • 93,000 miles


I was driving on a highway, towing a trailer in an area of heavy congestion. When I attempted to accelerate, the vehicle began to shake violently and lost power. The engine was apparently misfiring and was running very rough. The check engine light came on and I pulled off the highway. When I stopped, I put the vehicle in neutral, but left it running. The check engine light went off and the engine seemed to run fine. But ever since then, whenever I attempt to accelerate, the vehicle shakes violently and won't accelerate. This is going to cause an accident! I checked around the internet and this seems to be a common problem with this vehicle, but when I called Ford they told me I would have to pay to have a local dealer run diagnostics. They admitted that they had issued a technical service bulletin to the dealers on a possible fix for the problem, but reading the other complaints on this NHTSA website, the fix did not solve the problem. I've never sued anyone in my life, but I see there is a class-action lawsuit against Ford for this problem. I was hoping that if enough people report this problem that Ford would do the right thing- we shall see....

- Destrehan, LA, USA

problem #265

Sep 022014


  • 70,000 miles
Approximately 9 to 10 times I have experienced loss of power shuttering misfires and backfiring only to find fouled spark plugs I have replaced the spark plugs approximately eight times in 10,000 miles due to this condition on this Ford eco-boost engine. All tsb's have been completed on the truck yet I still experience this engine problem

- Charleston, WV, USA

problem #264

Aug 012015


  • 100,000 miles
We drove the vehicle 6 hours with the air conditioner on.... parked it - started it again about 2 hours later. The vehicle revved very high, barely chugged as we drove and then the yellow "wrench" light came on - indicating transmission issues as well as a "limp home" mode. We were unable to drive the vehicle at that point and had to keep it parked.... after doing some research - we discovered that condensation had gotten into some sort of condenser and caused the eco-boost engine to misfire and essentially malfunction.

- Holmen, WI, USA

problem #263

Jul 272015


  • 68,500 miles
When the turbo boost is 11psi misfiring begins - no after market engine programming. If turbo demand is not reduced, or is increased the engine light will come on and the transmission will be disengaged - 'limp mode.' On the date cited, this happened no less that 3 times. Local humidity was 50-70%, as I recall, and there was no rain. I have experienced this multiple times with local humidity noted at 50 %. my experience is that the misfiring will occur anytime turbo psi exceeds 11, whether towing or not, though towing will be more apt to encounter 11psi. My trailer is within all tow load limits for my truck, axles and tongue, per Ford's rv & trailer towing guide. My first experience with the truck going limp was June of 2014. I pulled the truck to the shoulder next to a guard rail and called for towing. The local Ford dealer said that there had been a #3 cylinder misfire and a momentary head over-temp was - which triggered limp mode. I have reported the misfiring to my dealer, and with Ford's customer service. The dealer says Ford has nothing listed for my truck or the issue. I told customer service and my dealer that there is plenty of internet traffic on this issue. Aside from the technical service bulletin implemented to put a larger air shield on the intercooler (cac), done to my truck in 2014 as a result of my experience, the issue still exists. It would seem to me that Ford has not engineered a water separator to then drain off developed water from the condensation process before it is ingested into the cylinders. Ingestion of the water into the cylinders would cause a spark misfire, as was suggested to me by a Ford mechanic. My vehicle is still under a Ford issued extended warranty, as a result of a separate transmission issue. God forbid this occur while to someone towing on a two lane road with no shoulder!

- Wildwood, MO, USA

problem #262

Nov 022012


  • 13,000 miles
My 2011 Ford F-150 ecoboost 3.5 was idling at a red light then suddenly began a very rough idle. This went on for about twenty minutes ( on and off) then cleared up. We took the truck to the local dealership and had them look at it. They did a service order and came up with nothing wrong. We took the truck home and the problem remained. The truck was taken back 4 or 5 more times for the same problem and the dealership could never find a problem. While driving the vehicle on the highway and attempting to pass slower moving cars, the truck hesitated and sputtered when the gas pedal was depressed. A month ago the engine started making a noise after a cold start and then lately a louder noise from time to time in the passenger side front area of the valve cover. Then the truck just stopped on me while on the highway. I had it towed to the dealer and now we are talking about a new engine" what the ????" it has 50K and the oil was changed regularly, but the dealer is saying there is sludge in the oil which was changed less than 2000 miles ago. The timing chain is stretched, the intake cam vtc is broken and based on all of the other similar post I've been reading about this same issue they have revealed that the rod and cam bearings are also more than likely prematurely worn, requiring a new engine to repair the damage.

- Mcallen, TX, USA

problem #261

Oct 232014


  • 57,000 miles
The contact owns a 2011 Ford F-150. The contact stated that while driving approximately 50 mph, the steering wheel was hard to turn and a warning displayed on the panel that read 'service advance trap". the vehicle was taken to the dealer. The technician was not able to diagnose the failure. In addition, the contact stated that when attempting to pass another vehicle, the accelerator pedal was activated and there was loss of acceleration as the check engine light flashed on and off. The failure recurred multiple times. The vehicle was not repaired. The approximate failure mileage was 57,000.

- Manteca, CA, USA

problem #260

Jul 202015


  • 70,000 miles
The engine lost power, the airconditioning shut off. When trying to accelerate, the truck shuddered hard. When the truck was brought to a stop, it was like everything reset. The engine would accelerate correctly, the air conditioning came back on, and there was no shudder.. the Ford house said there were no codes stored to identify the problem. They recommended a $1100 tuneup.

- Cedar Hill, TX, USA

problem #259

Dec 212013


  • 38,000 miles
The engine stalled (severer loss of power) as I tried to overtake/pass another vehicle. This has happened numeous times & typically occurs during humid/raining weather. I have taken the truck to the dealership several times but they have yet to resolve the issue. It is my understanding that Ford is very aware of the problem and has issued several technical service bulletins but, the problem still exist. Ford should be held responsible for this safety issue & forced to recall and repair these trucks before someone is seriously injured or killed.

- Hallsville, TX, USA

problem #258

Jun 202014


  • 34,000 miles
When accelerating and approaching freeway speed, engine stumbled, preventing acceleration. I let off the accelerator and problem didn't occur again. I reported this to the dealer, but they stated that since the vehicle did not register a code there was nothing they could do. I have since had this happen again on July 17 & 18, 2015, but this time the engine light did come on, so I'm assuming it did register a code. On July 17, it was a clear dry day, the following day it happened again, but it was raining all day. Once on the freeway, whenever I stepped on the accelerator, even when at freeway speed, the engine would stumble and barely accelerate. I've contacted the dealer and scheduled an inspection for July 29, 2015. The vehicle currently has 47000 miles. I've talked to Ford customer service and I am being told this is not a warranty repair, but I am seeing a number of service bulletins being issued describing this exact problem. I believe this is a defect in design and should be covered under the manufacturers warranty.

- Dearborn Heights, MI, USA

problem #257

Dec 042014


  • 60,081 miles
Going up highway @ 55mph. Pulled around a vehicle to pass. Once, I was in the oncoming traffic the engine suddenly lost power, chugged, and was stumbling over itself. I then got back behind the vehicle I was passing. The 4 passengers and I were all quiet and then freaked out. After a while we pulled out and accelerated to go up road again, truck dogged out. We had no clue what was happening, but everyone was freaked out. We called birthday party destination to tell them we have vehicle trouble and can't make it. Drove it down hill all the while worried the engine was going to blow. Drove it directly to dealership who stated they had no clue and did not want us to leave it there. Said set up appt. 7-10 days out. Parked it until appt. Then they replaced all spark plugs. We also have had troubles with the braking. Where it suddenly takes extra effort and requires the driver to press hard on the brakes to get it to slow down. When we've driven it to Ford for repair they throw their hands up, act frustrated, like they do not have any clue as to what the problems are. We were hesitant to renew our state tags as it sits parked most of the time, since it chugged on level surface with no rain present, and the mechanics light came on. We feel scared driving it and it has remained parked for 3+ weeks. This is our newest vehicle, which looks new and yet we can't drive it. We're not made out of money, and can not easily replace this truck. We want Ford to fix the engine and the brakes, and not act like they have no idea about these problems. Ford wants us to take the loss on the vehicle value or continue driving it until something bad happens. They want nothing in writing. And, we do not want to sell the vehicle to a stranger. We'd allow you to inspect our vehicle....and drive it for a test drive. Would you want to be driving this vehicle with your young children as passengers?

- Littleton, CO, USA

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