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really awful
Crashes / Fires:
3 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
41,923 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 17 of 17)

« Read the previous 20 complaints

problem #7

Nov 152011


  • 700 miles


The ecoboost version that I own has an apparently "known" problem within Ford where condensation builds up because of the turbocharger intercooler to the point that when you need to accelerate heavily to avoid a problem, to pass someone, or simply to get on a busy street or freeway, the truck sucks all that water into the engine and it completely misfires similar to just running out of gas. When this happens it can easily cause and almost has caused an accident. This happened first at about 700 miles and has happened numerous times since especially in high humidity. I keep hearing about "some fix is being considered by Ford engineering" and that the problem is in the Ford oasis problem reporting system number [xxx] I believe but 7 months later I am still waiting for Ford to step up. This problem can and I expect will get people killed and that's just sad. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Bel Aire, KS, USA

problem #6

Jun 022012

F-150 6-cyl

  • 7,400 miles
2011 F-150 3.5L ecoboost loss of power when accelerating from 50-60 mph to pass a vehicle. Vehicle bogs down and I was nearly rear ended twice in one weekend. Many are having this problem, I have taken the truck in for service and Ford cannot find a fix. This is either a fueling issue or a condensation issue in the turbo system, this problem only occurs in high humidity or rainy weather and usually has a misfire feeling to it. Ford is not pushing the issue and there are going to be accidents before they do anything. Personally I would not like to be killed in my new truck. The engine light has came on and threw codes P0300, P0304, P0305, PO306, which are all misfires, but when the truck is shut off and turned back on no codes are stored. This needs to be fixed before someone gets hurt.

- St. Joseph, MI, USA

problem #5

Nov 012011

F-150 4WD 6-cyl

  • 8,000 miles
The truck has developed a rough idle that causes the truck to feel as if it is missing. Along with the idle the fuel economy has dropped 4-5 mpg. I have had the truck in 3 times and 2 different dealers to try to resolve the issue. While in service diagnosics the techs where able to get the truck to misfire twice but they felt that it was not enough to be signifcant. The first dealership suggested I trade the truck in on another because they did not have a fix. The second dealer stated that they contacted Ford and was told that their is a known issue but Ford does not have a fix for the issue and does not have a timeline for a adaquate fix. The issue has been apparent now for 6 months with no end in sight. I have been told that I will just have to deal with it.

- San Angelo, TX, USA

problem #4

Mar 222012


  • 12,000 miles


Drove 200 miles with cruise set at 73 mph towing an enclosed trailer, damp cool conditions. Pulled off freeway to fuel up. While accelerating on the on ramp to get back on the freeway, vehicle stumbled, lost all power to the wheels, truck would not accelerate. Removed foot from accelerator for a few seconds and pressed down again, this time the truck accelerated. Happened again 2 days later while driving through fog. Vehicle is a 2011 F-150 equipped with the ecoboost engine. Intercooler condensation is the suspected culprit.

- Albertville, MN, USA

problem #3

Sep 202011

F-150 4WD 6-cyl

  • 2,000 miles
Driving down a two lane road in the early evening, I was 3 or 4 cars back in a long line of over a dozen vehicles. We were all stuck behind one slow moving vehicle. A chance came up to pass and I pulled into the other lane. After stepping on the throttle the truck developed a misfire. It lost nearly all power and began decelerating. In the time since pulling out to pass, a semi truck had popped up over an upcoming hill. By this point, the vehicles previously behind me had moved forward and filled in my place in line. I began evaluating my options. I was now moving slower than the traffic in the right lane, but there weren't any openings to move back over. I examined the shoulder on the left side of the road looking for safe places to pull over. There were none in the immediate vicinity. After several very tense seconds, the vehicle suddenly regained power. I had just enough time to accelerate to an opening in the right lane and get back over. Likely cause: Condensation in the charge air cooler ingested into the engine upon a call for power. Since the first incident this has occurred several more times. Every single time has been after cruising for some period at less than half throttle, followed by a sudden acceleration in humid or rainy conditions. Ford claims to be aware of the problem and working on a fix. However after waiting for over 8 months since my first incident I'm starting to have my doubts. I have heard reports from numerous other people saying this exact same thing has happened to them. Some of those are over a year old and are still waiting on a fix from Ford. Being aware of this problem I try not to put myself into a situation that will require the sudden application of power. However I know no matter how well you plan, eventually you find yourself in a bad situation. I just hope when that occurs it isn't a humid or rainy day.

- Seneca, SC, USA

problem #2

Sep 102011

F-150 6-cyl

  • 9,500 miles
While entering a highway via an on-ramp doing about approximately 45 miles per hour I attempted hard acceleration to pick up speed and merge in to traffic that was doing approximately 65-70 miles per hour. When I depressed the throttle the vehicle did not accelerate, but it started to hesitate and shake. The check engine light came on and the vehicle would not go over 40 miles per hour. This almost caused an accident situation as I expected the vehicle to accelerate when it did not. I was then forced to pull over to the shoulder and shut the vehicle off. After restarting the vehicle the cel had cleared and the vehicle was operating normally. No code was stored in the PCM to indicate what the issue was. This happened several more times since the first incident. Once while towing a 4000lb boat/trailer which also almost caused a severe accident. Ford has found nothing wrong with the vehicle and concludes there is nothing they can do since no codes were stored. I will note that after receiving tsb 12-2-10 the vehicle will still exhibit the same symptoms described above, but now the check engine light does not come on. Vehicle will stall, go in to "limp mode" with no indication that anything is wrong. Only resolution is to turn the vehicle off and back on to clear the status. This creates dangerous situations when on a highway. Completely unacceptable.

- Concord, NC, USA

problem #1

Nov 012011

F-150 6-cyl

  • 100 miles
After 100 miles I noticed a vibration or miss while truck idles at stops. Since that time every person in the truck notices it at every stoplight or stop sign. I took truck in for service and they ran all computer test on vehicle and they informed me that there is nothing wrong that is just how vehicle runs. I ask the service rep how that can be and he advised me that there have been multiple complaints by other people and that there are no updates or recalls on it.if it gets worse to bring back and will see if they can do anything about it but at this time Ford is not looking into the situation. Also on a side note chrome tow hooks are rusting and there answer to that is to clean them with steel wool what a way to be treated after making a $40,000 dollar purchase. One very pissed Ford owner [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Glenshaw, PA, USA

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