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really awful
Crashes / Fires:
4 / 3
Injuries / Deaths:
0 / 0
Average Mileage:
21,848 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 17 of 17)

« Read the previous 20 complaints

problem #7

Jul 212012


  • 1,000 miles


The contact owns a 2012 Ford F-150. While driving approximately 55 mph, the engine misfired with a temporary loss of engine power. After a few seconds the vehicle resumed normally. In addition, the engine warning indicator would intermittently illuminate. The engine malfunction occurred five times. The vehicle was taken to an authorized dealer on eight separate occasions for the failure. The turbo boost, catalytic converter and C02 sensor were replaced at different times. The manufacturer was notified of the problem. The approximate failure mileage was 1,000.

- Luling, TX, USA

problem #6

Aug 132012


  • 2,000 miles
After using cruise control for 1 hour on a 4 lane highway at 70 mph during high humidity early in the morning I try to accelerate and the motor loses all power. I had tsb 12-6-4 applied to the vehicle Friday, three days ago, and though it may reduce the likelihood of this situation, it does not overcome what appears to be a design flaw with the intercooler in this ecoboost motor. This flaw allows for condensated water to be sucked into the motor and causing the misfire during hard accelerations after long periods of using cruise control in high humidity situation. The impact of losing power will be a fatal accident for a customer at some point in time if it has not already occurred.

- Gainesville, FL, USA

problem #5

Aug 122012

F-150 6-cyl

  • 2,800 miles
On two occasions I was cruising in high humidity or rainy conditions for close to 2 hours. Upon trying to pass the engine lost total power and the check engine light went on. After the first occasion I went to a dealer in Canada because I was vacationing there, they performed tsb 12-6-4 and sent me on my way. Today on the return trip back to the usa the problem occured again in Maine and the check engine light is on again. This problem can cause a sudden loss in power under certain conditions that could lead to a major accident since this event only shows it self at highway speeds when attempting to pass. Some have suggested that the problem is associated with the intercooler condensing water while cruising at speed and then ingesting the water upon acceleration causing the misfire and lost of power.

- New York, NY, USA

problem #4

Aug 102012

F-150 6-cyl

  • 800 miles


While driving a brand new 2012 Ford F-150 w/ 3.5L V6 eco-boost I was attempting to merge onto interstate while towing a small boat trailer when I lost towing power (RPM dropped instantly from ~4000 to ~2000 RPM despite having accelerator depressed) and the entire truck started violently shaking. This continued until I completely let off the gas for a few seconds. I then pressed down on the accelerator and things were back to normal. I could have easily lost control during the rapid deceleration had the roads been wet or if a big ole 18-wheeler had been behind me things could have ended poorly.

- Laplace, LA, USA

problem #3

Jul 082012

F-150 6-cyl

  • 350 miles
Brand-new car - 2 days old. Trying to merge into traffic on I-81 at night during light rain. Engine stalled during acceleration attempt while merging from the on-ramp onto right lane of interstate, forcing 18-wheeler to brake to void crushing me. Engine rumbled with very little power getting to the wheels, and recovered to normal driving mode within about one minute. Scariest driving event in my decades of driving. Internet research indicates that this seems to be a common problem with the 3.5L 6-cylinder ecoboost in humid weather, due to condensation in the intercooler being sucked into the engine, when accelerating sharply (such as merging into traffic, lane changes, etc., I.e., when full engine power is really needed). This will lead to fatalities eventually, if not fixed, but there seems to be no fix available from Ford.

- Hampstead, NH, USA

problem #2

May 012012

F-150 6-cyl

  • 3,000 miles
While driving my 2012 Ford F150 4X4 with the ecoboost motor to work on the garden state parkway I experienced the following issue: After cruising for about 20 miles at 65mpg I attempted a pass of slower moving traffic. The truck accelerated to about 80mph during the pass then suddenly the engine lost power and created an engine breaking situation. The trucks' speed dropped rapidly from 80 to 60mph and I had to abruptly move into the slow lane cutting off other cars to avoid being rear ended. As soon as the power/speed loss occurred the truck began to shake violently for about a minute or two until I eventually slowed to about 50mph. This has happened 2 times since owning the vehicle. The truck has 5000 miles presently and has been back to the Ford dealership 3 times for software updates, a catalytic converter replacement, to add an air deflector and it continues to throw codes and turn on the check engine light. I got it back yesterday and the check engine light went on again on my drive home. Also mileage seems to becoming progressively worse. I try to avoid passing situations as much as possible in fear the vehicle will create a dangerous situation for myself and other drivers on the garden state parkway.

- Toms River, NJ, USA

problem #1

Jul 092012

F-150 6-cyl

  • 4,905 miles
I was driving in a light rain when I gently pressed the accelerator and the engine started vibrating excessively making the whole truck vibrate like the wheels were falling off. The incident lasted about 10 seconds before it returned to acting normally.

- Missouri City, TX, USA

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