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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 2 of 17)

« Read the previous 20 complaints

problem #307

May 312016


  • 112,000 miles


While trying to accelerate at high speeds, such as passing on an interstate or accelerating up an incline, the truck shudders violently and engine light flashes. If driver maintains speed, engine loses all power and engine light stays on. Loss of power at highway speeds is deadly. I was almost rear-ended while trying to accelerate up a hill in busy highway traffic. Truck shuddered and lost power for 5 seconds. The truck coasted until I could apply power again to the engine. Applying power caused more shuttering, but engine did not lose power again because I was closer to the top of the hill and not as much strain on the engine.

- New Market, AL, USA

problem #306

May 312016


  • 77,000 miles
The contact owns a 2011 Ford F-150. While driving approximately 70 mph, the transmission unexpectedly downshifted to first gear and the vehicle slowed down. The check engine light illuminated. The contact exited the highway, turned off the engine, and restarted the vehicle. The vehicle was taken to a local dealer who stated that there was a recall. The technician informed the contact that the part needed to be ordered and reprogrammed. The vehicle was repaired; however, the dealer billed the contact for the repairs, claiming that the repairs were not done through the normal recall process. The contact was assured that he would be reimbursed by the manufacturer. The manufacturer was made aware of the failure and confirmed that there was a recall, but stated that the reimbursement would not be issued until the fourth quarter. The failure mileage was 77,000.

- Yardley, PA, USA

problem #305

May 202016


  • 121,000 miles
The contact owns a 2011 Ford F-150. The contact stated that the vehicle shook violently. The contact heard an abnormal noise and experienced a complete loss of power. The vehicle was not operable. The check engine warning indicator illuminated. The vehicle was towed to the dealer where it was diagnosed that the camshaft failed, there were multiple cylinder failures, low compression, and the engine was no longer salvageable. The technician diagnosed that the engine needed to be replaced. Prior to the failure, the driveshaft was replaced. The manufacturer was notified of the failure. The failure mileage was approximately 121,000.

- Wakeman, OH, USA

problem #304

May 222016


  • 98,000 miles


When driving the truck (what seemed like) shifted hard then the wrench sign came up on the screen and throttle would not work. I was doing 50 mph at the time and had to hit the hazards and pull over. Once I turned off the engine and turned it back on it seemed ok, pulled the code P2112 throttle body. Looked online and many, many people have the same issue. Can't believe this isn't a recall seeing how dangerous this is.

- Round Rock, TX, USA

problem #303

May 082016


  • 84,000 miles
While traveling at highway speed I wanted to accelerate and pass someone. I pulled into the left lane and pressed the gas. The engine shook the truck and it loss power. I had to move back into the lane.

- Bellmawr, NJ, USA

problem #302

May 032016


  • 100,090 miles
The timing chain belt was skipping, it would cause the engine light to come on while driving but then the engine light would go off the next time I'd stay it. This did this for as long as I had it. I mentioned the issue tho the dealer but when in the garage the engine light was no longer on and they would tell me nothing was wrong and no error codes were coming up. I've had this truck only 1 year 7 months and it started stalling out. I brought it to the garage and it was the timing chain.

- Waterloo, NY, USA

problem #301

Apr 272016


  • miles


The engine (3.5L ecoboost) has a rattle in the front region when started and at lower RPM's which was followed by the check engine indicator (timing chain issue). When driving in the city the vehicle was stopped at a traffic light and started to shake violently. The shaking ceased upon accelerating. The vehicle was immediately driven to a mechanic where we learned that the vct unit (exhaust side) had separated and a piece of the internal component flew outward boring a hole through the valve cover. We do not know where the projectile ended (hopefully not into another vehicle or pedestrian). It was also found that the oil was so low (from the hole in the valve cover) that it did not register on the dip stick nor did the indication alert notify the driver in the instrument panel. We brought the vehicle to a local kendall Ford dealership for the rattle/misfire issue before the vct ruptured and they gave the truck a clean bill of health after the replacement of a spark plug on cylinder #2. the misfire occurred when we were driving on a long highway 60mph and started to shutter and shake which almost caused us to crash (it already has the cac tsb fix installed). NHTSA should re-open the investigation on that because the fix did not work. It may have improved it, but didn't fix the problem. We have contacted Ford on May 4th about this issue and the representative said there is no recalls or alerts concerning our vehicle and we would have to fix it out of pocket. We are currently trying to work something out with the dealer. However, this issue when searched appears to be a very common one and due to faulty parts, Ford should in good faith offer a recall because for this fix, like ours, is about $2000 conservatively. Our vehicle has about 121,000 miles on it.

- Oakridge, OR, USA

problem #300

Apr 172016


  • 60,650 miles
On wide open throttle engine misfires. Got it to set a code after another hard throttle.drove truck 1500 miles and got 21 mpg.after trip I took it to dealer codes PO300 0304 0305 0306.had tsb for problem done last June. Still has same states may be plugs. Doesn"T seem possible getting 21 mpg with bad plugs. They want 260 dollars to check plugs on one bank. Ford needs to get this problem with wide open throttle miss fixed before someone gets hurt or killed.tsb did not fix the problem. The newer trucks have a different innercooler system is the moisture causing bad spark plugs" what's going on here"

- Milwaukee, WI, USA

problem #299

Apr 062016


  • 60,000 miles
#1: driving down the interstate, attempting to pass a semi; vehicle lost power as I tried to accelerate and we had to coast to a stop. This has actually happened twice. The first time they replaced the intercooler and the second time I replaced the spark plugs. It occurred about three weeks after getting the vehicle it's regular service. If there was a problem with the gaps on the plugs, and they knew cars were losing power because of it, then they should have mentioned that at the service! #2: driving down the interstate and speedometer jumped around and went to zero. After I got off the highway, I lost power and had erratic shifting while trying to cross an intersection. There's a tsb out for this too!! why isn't there a recall if there's a defective part that creates dangerous situations!"!"

- Frisco, TX, USA

problem #298

Apr 032016


  • 83,000 miles
At 50 mph while accelerating in traffic the engine shook and I lost power. This only happens with the ecoboost engine. Ford told the NHTSA this was corrected and the suit was ended. Ford will not install this repair in my truck.

- Bellmawr, NJ, USA

problem #297

Mar 212016


  • 50,000 miles


The contact owns a 2011 Ford F-150. The contact stated that the instrument panel seized without warning. The failure was persistent. The engine stalled while the failure was occurring. The vehicle was able to restart. The vehicle was taken to a dealer where the failure could not be determined. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 50,000. The VIN was not available.

- Boynton Beach, FL, USA

problem #296

Apr 022016


  • 57,000 miles
Under acceleration the vehicle shudders, and shakes. It seems to lose power for seconds before it picks back up. Has happened several times while pulling my camper and passing vehicles on highway and interstate. The other day while driving down the parkway the truck down shifted from 6th gear to 1st or 2nd without warning. I was almost rear ended and had to drive off onto the shoulder to avoid the collision. I have contacted Ford and I will be taking the truck in for warranty work on Wednesday April 6th 2016. I only have 3K miles left on power train warranty and none left on bumper to bumper. I purchase Ford vehicles cause of there long lasting and reliable reputation. I have two children and wife that I expect to keep safe while driving this truck. I hope Ford will look deeper into the problems at hand, dont be like GM and kill people before you fix the issues.

- Meridianville, AL, USA

problem #295

Apr 012012


  • 15,000 miles
The contact owns a 2011 Ford F-150. The contact stated that the vehicle stuttered violently, while driving at various speeds. The dealer replaced the spark plugs and the spark plug boots. However, the contact felt that the repair would not be a permanent repair. The manufacturer was made aware of the failure. The failure mileage was 15,000.

- Hummelstown, PA, USA

problem #294

Mar 102016


  • 67,000 miles
My F-150 supercrew 4X4 with ecoboost engine began misfiring on hard acceleration situations, such as merging and changing lanes on the interstate. After approximately 2 months, the issue has gotten worse to the point of misfiring under normal acceleration. The jerking from the misfire condition is quite violent, and I believe to be unsafe. This is a known issue related to the design of the trucks intercooler. Condensation builds during prolonged highway driving, particularly in humid climates. I am in Arizona, but I drive 50+ miles a day on the freeway. The NHTSA dropped their investigation of this unsafe condition, apparently agreeing that Ford's tsb was sufficient in dealing with the matter. My truck is not under warranty, however it exhibits a design flaw that is unsafe. How is there not a recall on this? disappointing.

- Tucson, AZ, USA

problem #293

Mar 042016


  • 65,000 miles
I own a 2011 Ford F150 ecoboost V6. For the past year, the engine will quit making power under acceleration when merging onto a highway or passing. I currently have 65000 miles. Ford has told me there are no recalls and invited me to spend my money in their service department when this is clearly a known issue. This is clearly and unsafe issue and just a matter of time before someone attempts to merge on a highway and is hit by another vehicle because the truck suddenly lost power.

- Island Lake, IL, USA

problem #292

Mar 022016


  • 120,000 miles
There are @ hoses that come out of the radiator and go into a hard plastic T-piece (part number dr3Z-8566-a) and there are O-rings inside of it. Mine started leaking and I was informed that I had to replace the whole piece no big deal. Then the dealer ship went on to tell me that they have replaced 6 in the last 2 weeks of the same exact year and model. The dealer ship is in lima Ohio. That being said if there are so many of these that are going bad and the vehicle only being 5 years old I feel like there is obviously a defect in the part/ design of it that causes it to fail.

- Kenton, OH, USA

problem #291

Feb 272016


  • 30,000 miles
When accelerating, especially going uphill, the engine makes a repetitive whooshing noise.

- Orleans, VT, USA

problem #290

Nov 142015


  • 75,000 miles
The contact owns a 2011 Ford F-150. The contact stated that while driving at 55 mph, the vehicle failed to accelerate when the accelerator pedal was depressed and the gauges in the instrument panel began to fluctuate. The check engine and the wrench warning light illuminated. In addition, the gear shift indicator began to change rapidly. The failure recurred intermittently. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 75,000.

- Tabernacle, NJ, USA

problem #289

Feb 202016


  • 50,000 miles
My 2011 Ford F-150 with the ecoboost package will stall upon acceleration. The engine light will flash momentarily. This is a safety issues as it causes the vehicle to act in a manner that inst predictable when changing lanes on an interstate or passing. This has happened on multiple occasions and a simple google search indicates this issue is widespread with this model.

- Pineville, LA, USA

problem #288

Feb 012016


  • miles
Engine coolant is overheating. Engine coolant temperature gauge in the normal range ( between H and C ).transmission fluid temperature gauge (between H and C ). gauge detail- ---- trans temp -195 - 210 F.20 minutes driving (not towing ).check the level of the coolant in the reservoir --- low!!!. adding 1/2 gall -5O/50 mixture coolant. 02/16/2016 - apple Ford (columbia, md ) check engine cooling system. --- found coolant tank and coolant hose from tank to heater core leaking. Car mileage-44117. Car for life oil and filter change, mulitpoint inspection.

- Silver Spring, MD, USA

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