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 1 of 17)

problem #336

Sep 062016


  • 62,000 miles


Tsb 14-0196, tsb 15-0131, tsb 16-0027 - all explain the issue, so yes Ford knows it is a reoccurring issue. Its basically the engine rattling for 2-5 seconds when you starting the vehicle from a cold start. In mechanics terms the primary timing belt has stretched and takes that 2-5 seconds to pick up the slack.this video explains it very well. Https://www.youtube.com/watch"V=wt3ac_H8wl0 Ford only covers this issue for 5yr/60K miles which is terrible. Tons of different models of Ford have this issue over a variety of different years. This should easily be a recall on Ford or atleast an extension in warranty. This repair will cost around $2000 to have a Ford dealer fix it for you. I currently only have 62K miles on my truck and Ford still won't even give me a discount for the repairs. Im only 2K miles over the warranty mark and still get nothing" I've loved Ford trucks for years but after all this, its easily driving me away from wanting another Ford.

- Pittsburgh, PA, USA

problem #335

Jan 022017


  • 45,600 miles
3.5 eco boost bogged down when I was passing....on 1-2-20017..almost caused an accident..same symptoms as manny eco boost F150 Ford....very dangerous !!!!

- Wheeling, WV, USA

problem #334

Oct 142016


  • 28,000 miles
The contact owns a 2011 Ford F-150. While driving and while stopped, the engine revved uncontrollably on several occasions without warning. The vehicle was taken to the dealer, but the failure could not be duplicated. The manufacturer was not notified of the failure. The failure mileage was approximately 28,000.

- Scott Depot, WV, USA

problem #333

Dec 152016


  • 111,000 miles


Intercooler for turbo has been replaced twice and will need to be replaced for a third time as the vehicle loses power when accelerating for passing, etc.

- Austin, TX, USA

problem #332

Dec 142016


  • 90,000 miles
My 2011 F150 FX4 has been acting up with the transmission. This has happened multiple times and the dealer is unable to replicate it. So far they have changed all of th coil packs, reset the transmission, changed all the spark plugs in a hope that was the issue. Well it's not. The truck lunges forward with loud bangs and grinding noises. RPM's go up and down and the truck sounds as if I downshifted from 6th gear to first. Then I can only go 40 miles an hour with high rpms. Engine lights have lit up and now a wrench. This is crazy my gauges don't work this is dangerous.

- Somerset, NJ, USA

problem #331

Nov 252016


  • 103,000 miles
This is the second time I have had this issue with this truck, while merging on a highway, my truck loses all power and starts shaking rapidly, once again I was almost involved in an auto accident because I could not merge. When I initially had this issue 50 thousand miles ago, I brought my truck to auto-nation Ford in white bear lake Minnesota, they said it was an issue of spark plugs, wires and coil packs, Ford also said the issue was the inter-cooler. Ford fixed all of those issues roughly 50 thousand miles ago, but here we are, my truck is at 100, xxx miles and this issue happened again! this is a serious safety issue, I have now been run off the road twice and almost crashed into a lake! when my truck loses all power and starts shaking rapidly, I lose control of the half ton truck. I contacted my local Ford dealership, (auto-nation Ford) in white bear lake, where I bought the truck and they would like me to pay in full for all of these issues, which Ford clearly knows about. I know for a fact I am never buying a Ford again, my safety and the safety of my family has now been compromised on multiple occasions and Ford has not once taking responsibility or offered to fix the issue. I am very disgusted with the way Ford has been handling these safety issues. When you buy a brand new truck and things like this happen, the company should take care of you, but once again, Ford has proved that they do not care about their customers.

- White Bear Lake, MN, USA

problem #330

Nov 022016


  • 35,000 miles


The engine misfires and changes to "limp mode" after the engine shudders, shakes and looses power. This has happened twice in the life of this vehicle. Also the steering sticks when turning left.

- Burnsville, MN, USA

problem #329

Oct 042016

F-150 6-cyl

  • 61,000 miles
Just letting you know the stumble issues to these vehicles could be dangerous had it happen a week or so ago while towing. The power was totally gone at full throttle while passing a vehicle. What if I didn't have enough time. I just discovered all this information. As I am typing this my vehicle is in the shop getting the catalytic on the driver side (bank one) replaced and a re-flash, as it threw the P0430 dtc. Again it was a drastic power loss at full throttle, when throttle released regular operation occurred. "you try letting off the throttle while in the middle of a pass, I didn't". and by the way I was a mechanic most of my working days. Just because people don't report it doesn't mean it doesn't exist. In my opinion there are a lot more of them out there with the same problem, just google it and you will see many. Thank you

- Casper, WY, USA

problem #328

Sep 012016


  • 130,000 miles
The contact owns a 2011 Ford F-150. While driving various speeds and slowing down, the rear of the vehicle jerked without warning. The vehicle was taken to a dealer where it was diagnosed, but not repaired. The results of the diagnostic were unknown. The manufacturer was not notified of the failure. The failure mileage was 130,000.

- Sioux City, IA, USA

problem #327

Oct 072016


  • 47,500 miles
On hard acceleration like when entering a highway or trying to pass another car it will miss fire continuously thru the acceleration 60-70 mph.shaking violently and check engine light blinking throwing P0300 codes for misfiring at 47,000 miles changed all spark plugs / coil packs / wires / air filter / 48,000 still misfiring

- Denham Springs, LA, USA

problem #326

Sep 012016


  • 80,000 miles


2011 F150 connecting rods broke at normal highway speed beating a hole in block oil is all pumped out of motor coverimg the windshield of cars behind me one was 80000 the second was only 60000.

- Crossville, TN, USA

problem #325

May 142016


  • miles
Takata recall there is a cold start noise kinda sounds like a grinding noise also have a huge power loss when ever trying to accelerate. I get codes P0016 P0017 P0299. I have changed all came and crank sensors.

- Taylor, MI, USA

problem #324

Jul 012016


  • 67,000 miles
The engine on my 2011 ecoboost 3.5 L V6 Ford F150 shudders and stalls when you try and accelerate. The problem is sporadic. The truck has 67,000 miles and has stalled out when I was trying to accelerate into busy intersections or making turns at least three times and has happened while driving on the interstate four times. It was quite scary and extremely dangerous. The dealership says that the issue is my truck and not a Ford problem, though this is clearly something that has occurred in countless 2011 ecoboost F150 engines as it is all over the internet. This engine should be investigated by your organization and the vehicles should have been recalled. Below is a link with thousands of complaints that are all the same. M.carcomplaints.com/Ford/F-150/2011/engine/engine.shtml two dealerships suggested I replace the engine at a cost of $12,000 to me. Currently, the car is not driveable.

- Austin, TX, USA

problem #323

Sep 022016


  • 97,000 miles
While traveling on the highway in the rain the truck began to shutter and loose power during acceleration. A few days later in sunny weather it was fine with no problems accelerating. Looks like from reading on the NHTSA site this is a turbo issue that occurs during humid or wet weather. Since Ford is aware what will they be doing to solve the issue?

- Fort Mill, SC, USA

problem #322

Aug 122016


  • 78,000 miles
Vehicle loses power and misfires when accelerating especially at 50mph or higher. Recurring problem over the years. Mostly an issue when passing on two-lane highway. Extremely dangerous.

- Stillwater, MN, USA

problem #321

Jul 032016


  • 54,000 miles
On hard acceleration like when entering a highway or trying to pass another car it will miss fire continuously thru the acceleration.on several ocasions it down shifts and then the engine loses power.this has happined meany times in the last 2 to 3 years.

- Shelby Twp., MI, USA

problem #320

Dec 012015


  • 88,000 miles
The contact owns a 2011 Ford F-150. While driving approximately 50 mph attempting to pass a tractor trailer, the engine misfired and the vehicle would not properly accelerate. During the incident, the check engine light illuminated. The vehicle was taken to the dealer where the spark plugs were replaced, but the failure recurred. The manufacturer was notified of the failure. The failure mileage was 88,000.

- Cincinnatti, OH, USA

problem #319

Aug 152016


  • 75,000 miles
While accelerating onto the highway truck began shaking violently and lost power. I was towing a trailer at the time and was nearly struck by a large truck because I couldn't get up to speed or off the highway because of loss of power. This is a known problem with 3.5 liter ecoboost engines and it is only a matter of time before someone is seriously injured or killed because this issue has not been successfully addressed by Ford.

- North Canton, OH, USA

problem #318

Aug 102016


  • 61,300 miles
Since I've owned this vehicle new, I've had a number of problems related to acceleration. Vehicle would almost stall on hard acceleration when getting on the freeway. Dealer replaced spark plugs & boots, but condition was not completely resolved. Vehicle would still on occasion repeat the same problem. More recently when driving yesterday, the engine light started blinking, then became steady. Of greater concerned I got an engine light & poor acceleration. Took the vehicle to the dealer & dealer is telling me that the timing belt needs to be replaced at a cost of $2000+. vehicle had just turned 61000 miles. Dealer service agent tells me its not uncommon and could be caused by not getting the oil changed at recommended intervals. Vehicle has had regular oil changes at the dealer & other service facilities. Never heard of this & I think it's premature for a vehicle with 61000 miles to need the timing belt replaced. Never had this happen in 45+ years of driving.

- Northville, MI, USA

problem #317

Jul 302016


  • 10 miles
While driving on hwy when acceleration the vehicle looses power and I had to pull over and shut off the engine and re-start it, almost causing an accident. Then when driving on normal road conditions and accelerate the vehicle to pass, and the same thing happens, the engine miss fires, looses power and the check engine light is on since the first time it happened. Took the truck to the Ford dealer and they said it was "an ongoing problem with the ecoboost and the air charge cooler". they said the fix is to put a intercooler deflector (piece of plastic over the intercooler), change the spark plugs and do a vehicle software update witch is going to cost around $700 to fix. Outrageous cost for a tune up and a piece of plastic for something they know its a "ongoing problem" and don't want to have a recall. This is a safety issue, and they know about it but since the vehicle is out of warrantee I have to deal with it. Wonder how many others have this issue?! this is definitely the only and last Ford I will buy. This does not guarantees that its going to stop it from happening again. With this amount of money I could buy an aftermarket intercooler, do a complete tune up and still have money left.

- Byron, GA, USA

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