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really awful
Crashes / Fires:
3 / 2
Injuries / Deaths:
0 / 0
Average Mileage:
20,747 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.

2012 Ford F-150 engine problems

engine problem

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2012 Ford F-150 Owner Comments (Page 1 of 16)

problem #315

Jun 012016


  • 15,000 miles


2012 F-150 ecoboost with 55K miles. Sever loss of power and missing during idle and acceleration. The issue started at 15K miles and after a lot of pushing, Ford installed the deflector shield for water. That solve the problem for heavy rain, but the missing, lack of power, and poor mileage has persisted and is getting worse. The issue happens when the vehicle is in park, stationary in drive, and while under power. It is really bad when it is under heavy power. This is dangerous when it comes to merging into traffic and loosing power all of the sudden. It seems to be worse when it is hot and/or hot and humid out.

- Thornton, CO, USA

problem #314

Jun 152015


  • 52,350 miles
The contact owns a 2012 Ford F-150. While driving 55 mph, the vehicle lost power during acceleration and the check engine warning indicator illuminated. The vehicle was taken to a dealer where it was diagnosed that the spark plugs needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The VIN was invalid. The failure mileage was 52,350.

- Battle Creek, MI, USA

problem #313

Oct 312015


  • 25,000 miles
The contact owns a 2012 Ford F-150. While driving approximately 65 mph, the accelerator pedal was depressed; however, the vehicle misfired and the rpms increased. The check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the charge air cooler and the catalytic converter needed to be replaced. The vehicle was partially repaired. The manufacturer was notified of the failure. The approximate failure mileage was 25,000.

- Clarksville, TN, USA

problem #312

May 082016


  • 29,000 miles


F150 2012 in traffic engine dies goes into the limp home mode which is under 5 mph engine will restart but you have to come to complete stop put in park and start and your good to go until it happens again and it will. Not at all safe does it on the freeway or city driving no warning just dies.had to dealership numerous before it was discovered it was a bad throttle replaced at my expense

- Williams Bay, WI, USA

problem #311

Jun 072016


  • 75,000 miles
The vehicle will lose power and begin to shudder. Cold starts it will shudder and RPM will bounce from 400 to 1100. Will lose power in turns and while stopped. Dealer has had the vehicle 3 times and cannot find a problem.

- Gunter, TX, USA

problem #310

Apr 272016


  • 56,300 miles
The contact owns a 2012 Ford F-150. While driving at various highway speeds, the check engine light suddenly illuminated. The vehicle went into limp mode and caused the speed to reduce to less than 20 mph. The failure occurred on several occasions and the vehicle was taken to the dealer multiple times. The spark plugs were replaced, but the failure continued. The manufacturer was notified of the failures. The failure mileage was 56,300.

- South Williamsport, PA, USA

problem #309

May 042016


  • 78,000 miles


I have a 2012 with 78000 miles. I am experiencing the very common tsb15-0131. A few months back I started to hear a rattle at some engine starts but now it is occurring daily. I only started to research the noise recently and came across a lot of others on the web forums. I dropped it off at a local dealer. The guy made it sound like this is something new or never heard of. Long story short, they had the truck 4 days and claimed they heard no rattle when starting. After getting my truck back from the local dealer I have heard the noise every morning when I started the engine. I video record my engine at start up and plan to from now on. I called my purchasing dealer to see what they can do. They were going to check and let me know. I heard back and they say since I am out of warranty there is nothing they can do. They said I have to contact Ford customer service to go further and gave me the phone number. I contacted them who said the same thing..sorry no more warranty. I do not think this is right. I understand my extended warranty is just past but this seems to be a prevalent issue with the 3.5 ecoboost engines. I paid over one thousand dollars to upgrade to this engine after seeing and hearing advertisements about its benefits and durability. Now, when it has a problem by no fault of mine, I am told that it will not be taken care of. This was my first Ford and will be my last.

- Wheaton, IL, USA

problem #308

Apr 042016


  • 60,000 miles
When on cruise control going 60-70 mph, and you pull out to pass and step on the gas, the ecoboost "hesitates" and will not gain speed, but loose speed. I can only stop this by downshifting, then reengaging the gas. This can be a very dangerous situation. This has happened about 10 times over the last 4 years.

- Madison, AL, USA

problem #307

Apr 062016


  • 71,000 miles
F-150 with ecoboost engine fails with hard acceleration in wet conditions. Fords fix is to install a new part due to a design defect that allows water to be ingested resulting in spark plug failure. On 4/17/2016 while attempting to merge on highway 57 the engine failed to power up and "bogging" down. This forced me on to the shoulder in order to avoid a collision with a 18 wheeler.

- Holland, MI, USA

problem #306

Mar 302016


  • 43,000 miles
When driving at speeds less than 20 miles per hour the engine will make a loud clunking noise. I have taken the vehicle in to Ford on several occasions and they had never been able to reproduce the problem until today. They told me the rear transmission mount needs to be replaced. This problem has been going on since the day I purchased the vehicle. My last service visit they found a problem with the 4WD vacuum seals that they attributed to this issue and fixed that problem. I thought would resolve my issues but it did not. I am not confident that fixing the rear transmission mount is going to resolve the vehicle problems. I recently had the issue found in #PE13018 resolved by the dealership.

- Jacksonville, FL, USA

problem #305

Feb 012016


  • 72,000 miles


Vehicle fuel pump shuts off while driving due to fuel pump fuse (location #27) burning up in fuse box. After my vehicle shutting down while driving several times, last on the highway, with a total loss of power steering and other safety concerns, I found Ford has issued a tsb (tsb 15-0137) with a work around fuse relocation. This is unsatisfactory as this is a known issue to Ford, but not the consumer, putting drivers at risk. The fuse at issue, location #27, literally melted and burned up in the socket.

- Lake Worth, FL, USA

problem #304

Feb 012016


  • 20,000 miles
I took delivery of this truck in March of 2012. The truck has had documented ongoing serious drivability, safety and reliability issues since October of 2013. The issue of immediate concern relates to ongoing misfire, back fire, and engine stall. This condition has occurred at low speed, highway speed, and while towing. The immediate loss of power and subsequent surging effects caused by this condition renders the truck hazardous to me, my family, and other motorists. This issue has been repeatedly reported to and serviced by Ford. I have also personally filed complaints and concern with Ford Motor Company. See Ford customer service case number 8603638. The misfire, back fire, and engine stall is the current ongoing issue but you will also see in the service history this vehicle has also experienced traction control, drive shaft, steering system, and sensor/electrical component failures dating back to may of 2012. It is my understanding Ford Motor Company is aware of this issue with the eco boost engine and drivetrain in my truck. This known issue was responded to by tech service bulletin 13-2-14. However, the mitigation measures of that bulletin and other subsequent service attempted to repair my truck have not been successful. Further, the service bulletin does not take into account the significant safety issue of a truck traveling public roads and experiencing sudden loss of engine power. Finally, I want to point out that the ignition/engine problems my vehicle experienced has caused premature failure to other components to my drive train. This includes fouled spark plugs, damaged coils, and likely accelerated end of life to other emission controls and mechanical components to the engine due to the misfire and water entering the combustion chamber.

- Sioux Falls, SD, USA

problem #303

Nov 272015


  • 76,000 miles
For two years the rear slider and defrost hasn't worked. When accelerating to pass the engine light comes on and the truck starts to chatter.

- Tiller, OR, USA

problem #302

Dec 232015


  • 74,000 miles
The contact owns a 2012 Ford F-150. While driving approximately 30 mph, the vehicle hesitated and steam appeared on the front windshield. The contact parked the vehicle and discovered fluid leaking from the vehicle. The vehicle was taken to the dealer where it was diagnosed that there was a vapor leak. The vehicle was not repaired. The failure recurred on several occasions while driving at various speeds. The engine coolant had to be replaced each time. The vehicle was taken back to the dealer where it was diagnosed that the radiator wide pipe was too narrow and needed to be upgraded to a wider pipe. The manufacturer was made aware of the failure and informed the contact that the VIN was not included in the recall that was issued for other Ford vehicles. The VIN was invalid. The approximate failure mileage was 74,000.

- North Richland Hills, TX, USA

problem #301

Dec 302015


  • 48,250 miles
Ecoboost, almost 5 serious accidents in a year. In Jan, my wife, 3 children & I were on I-85 in heavy traffic when my truck stalled. We went from 65 mph to 20 & no power. An 18 wheeler was barreling down on us & had to make an aggressive move with his brakes locked to miss us & the other cars. I pulled the car through 4 lanes of 65 mph traffic, doing 15-20 mph & turned the truck off to get it running again. Next, I was stopped at a light. When the light turned green my truck stalled out 3 times before the truck would finally go. Over the next month my truck stalled at least 10 more times. In April, Ford told me that the ecoboost had a problem & they performed tsb 13-8-1, reprogramed PCM & installed deflector. I haven┐T notice any power loss, but lost 2 mpg from my normal driving habits. In June, I merged into heavy traffic & my truck stalled. 65 mph to idle on a major highway. I don┐T know how I avoided an accident. I pulled off the highway & turned the truck off to get it going. My truck stalled 5 more times before taking it back to Ford. In August, my truck stalled at an intersection 4 times. I completely blocked traffic for about 10 mins. I got on the hwy & went 8 miles. My truck stalled 14 times┐ very dangerous. Every time I got the truck up to speed, it would stall & I would have to pull it over & turn the truck off and restart it. In Aug I took my truck to Ford & they replaced the throttle body. 2 months later it was stalling again. Ford told me that it was misfiring & that they needed to change the plug boots, spark plugs & the fuel filter. I was told that it was the next step they were required to do. So now I┐M paying Ford to test different things & hope that something works. Yesterday I pulled out onto a busy street & my truck stalled. I was almost T-boned. I am driving a time bomb. Every time I drive this truck I am risking my life & everyone around me.

- Cornelius, NC, USA

problem #300

Nov 222015


  • 56,000 miles
When driving in humid or when moisture is present such as rain or mist the engine shudder, shakes, misses and even shuts down when quickly accelerating. I have had the engine completely loose power when merging onto freeway in heavy traffic. I took it to the dealer once when it was under warranty. They said the catalytic converter needed replaced. Of course I didn't drive in humid or raining environment conditions again until the warranty ran out. I have experienced the engine shut down at least 4 times since I bought the vehicle new. Almost crashed twice when passing or merging when engine shut down. The date entered below was the last time the problem occurred. First time was March 2013 when vehicle had about 16,000 miles.

- Rock Hill, SC, USA

problem #299

Jun 152015


  • 43,415 miles
The contact owns a 2012 Ford F-150. While driving 65 mph, the vehicle lost power and the engine warning light illuminated. The contact coasted over to the side of the road and powered off the engine. The vehicle was restarted. The failure recurred numerous times. The vehicle was taken to the dealer, but was not diagnosed or repaired. In addition, each time the vehicle was restarted, the vehicle would function normally. The manufacturer was notified of the failure. The failure mileage was 43,415.

- Humble, TX, USA

problem #298

Nov 202015


  • 100,000 miles
Recurring problem with the Ford eco boost engine in my 2012 F150. When accelerating the engine loses power and begins to vibrate. Unable to gain speed. I almost got rear ended because my truck would not accelerate and blend with traffic while merging off of an exit on the interstate. This has happened numerous times. The last time the engine warning light came on and remained on. When evaluated at the dealership I was told that several cylinders misfired and damaged the turbo. The repairs were close to $1000, two weeks later the exact same thing happened. Repairs are pending now. I researched the eco boost engine on the internet after experiencing the problems. There were numerous people complaining about the same problem. 'someone is going to get killed because of this problem. I was lucky.

- Shelby, NC, USA

problem #297

Nov 192015


  • 52,000 miles
I was cruising down the highway when all of sudden the truck would not accelerate and it felt like the engine had shut off. The RPM was fine, however on the speedometer it kept going up and down (my mph was all over the place), and it felt like some one was pumping the brakes (lightly). I tried accelerating but all it did was make a screeching sound. I had to pull over to prevent cars from rear ending me and placed in park. I noticed that the engine was still on at this point and pulled back out on the highway with no further problems. A few days later, I took it to a dealership which they ran a diagnostics and found no issues. On my way home from the dealership, I experienced the same thing as I was exiting I35.

- Fort Worth, TX, USA

problem #296

Nov 042015


  • 69,800 miles
After traveling about 35 minutes, I parked my truck for about an hour. After returning to my vehicle and pulling away, my truck would barely accelerate. I gave it more gas and a large wrench warning light appeared on my dash and soon disappeared. Once it was gone, my speedometer didn't function, the mileage was gone and the air bag disconnect warning light was illuminated. I decided to drive it to my dealership 10 miles away so they could attempt to register a code on their computer as I've had issues with this truck bucking/surging while traveling at highways speeds for 8 months. This is the first time a warning light had illuminated for a problem. In addition to the above issues, I noticed that the signals were not turn off automatically and had to be deactivated manually during turns. After the technician took technical information my vehicle was turned off and on and everything returned to normal. As I mentioned there have been multiple issues with my vehicle and they are getting worse and worse. I see no recalls from Ford on this ecoboost engine.

- Champlin, MN, USA

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