Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


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

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2012 Ford F-150:

Unsubscribe any time. We don't sell/share your email.

2012 Ford F-150 Owner Comments (Page 6 of 17)

« Read the previous 20 complaints

problem #227

Aug 012013

F-150 6-cyl

  • 20,000 miles


I was merging onto an interstate, accelerating from 20 mph to 65 mph to blend in with heavy traffic. The engine began to spit, sputter and shake and bogged down and wouldn't exceed 50mph. With a tractor trailer coming I had no other choice but to abort my merge and pull to the side of the road. I then waited for all traffic to subside before I made another attempt to pull onto the highway. I took the truck back to Ford. They could not duplicate the problem. I have had the truck in for many issues(slow speed shudder, high speed shudder, emergency brake issues, warped rotors, electronic problems, tire issues, acceleration hesitations, rough idle, failed brake pump, and more with less than 30, 000 miles) all of which Ford states are characteristics of the vehicle! this is my family vehicle that I Transport my 3 children and their friends. What will it take for Ford to resolve the problems they have with these trucks?! do people have to be killed before anything is done........ like with Chevy!!!!! Ford is covering up the issues they have with the #1 selling truck in America. It is a shame that people have a facebook page on the problems they have with their F150 because Ford covers up the problems because they don't know what to do to solve them. They told us it is a characteristic of the truck..........really!!!!!!!.

- Pittsburgh, PA, USA

problem #226

Apr 082014

F-150 6-cyl

  • 38,000 miles
The engine started misfiring and power loss.

- Morganton , GA, USA

problem #225

Apr 172014


  • 18,800 miles
My 2012 truck has the 3.5L eco-boost engine and it has shut itself down (gone into limp mode) at least 12 times. This morning (4-17-14) it just happened three times within a 45 min window. The temp outside was 50 degrees F and not raining. Normally this vehicle goes into limp mode during a turn or after a stop, but it has also happened at normal driving speeds (45-50mph). This is a new vehicle and I am no longer comfortable driving this vehicle due to safety concerns. This issue has almost create three separate accidents.

- Hamilton, OH, USA

problem #224

Apr 052014

F-150 6-cyl

  • 26,000 miles


Engine shudder/vibration after accelerating. Loss of lights, dash instruments, radio out. Vehicle check engine light came on. This has happened three times before. Taken to dealer twice for repair.

- San Antonio, TX, USA

problem #223

Nov 302013

F-150 6-cyl

  • 25,000 miles
Traveling on interstate highway from St louis to memphis in right hand lane. Accelerated to pass slower traffic when truck begin to shake violently, lurching forward and back. All the while losing speed and made me fearful to attempt to try to pass or merge. This continued all the way back to memphis. I took the vehicle in for service and described the problem to the service tech. When I picked the truck up the service ticket said "could not duplicate the problem. Since then the problem has gotten worse. I never know when it will occur. It could be rain or shine and there doesn't seem to be a pattern. It is now a weekly/daily occurrence. It has contributed to several near miss accidents. I am afraid to drive anywhere except side streets and I avoid the interstate hwy. The problem is so bad and the vehicle shakes so violently I was looking in the mirror to see what I had ran over. It is a serious safety issue that my Ford dealer denies exists!

- Coldwater, MA, USA

problem #222

Mar 212012

F-150 6-cyl

  • 11,212 miles
I own a 2012 F150 platinum truck with an ecoboost engine. We purchased the truck new. I was on the interstate and was trying to pass a slow moving car. The vehicle went into overdrive and began to shake. I pulled over to the side of the road. The check engine light was on. I turned off the vehicle and waited a moment. When I restarted the truck I drove to the nearest dealership. It did this again twice on the way to the dealership. They said that the wiring was at fault and replaced the defective part. Then at 34,470 it occurred again. We were on a highway about to pass someone when the truck began to shake and the engine slowed and would not accelerate. The dealership suggested that we use a higher octane fuel and said they could not find anything wrong with it. This problem occurred eight additional times. Then at 82,200 miles we were traveling up hill and heard a loud boom. We had it towed to the nearest dealership and found out that a connecting rod had broken causing two holes in the engine. We had to have the entire engine assembly replaced along with two new turbos. Ford would not cover because the engine had 82,200 miles and the power train warranty ended at 60,000 miles.

- Odessa, TX, USA

problem #221

Mar 242014


  • 66,000 miles


While attempting to merge onto the highway the engine shuddered and the cel came on which put my truck into limp mode. Since, under any load the vehicle shudders and goes into limp mode when there is any load put on the engine.

- Midwest City, OK, USA

problem #220

Mar 152014

F-150 6-cyl

  • 53,000 miles
Ecoboost engine sputters and loses power when passing. Engine starts running rough and loses all power. Very dangerous when attempting to pass.

- Spring, TX, USA

problem #219

Feb 272014


  • 30,567 miles
When accelerating to merge onto 4 lane byway veh. Lost all power started eng miss. Throttle had no effect, coasted along in emergency lane for about 10 seconds. Veh started to accelerate while still missing for about 5 more seconds. 3/4 fuel tank. Ps was a auto tech. For 28 years with U.S.P.S.

- Lake Placid, FL, USA

problem #218

Jan 082012

F-150 6-cyl

  • 25,000 miles
Traveling down the road. Got up to 55 to 60 mph lost power transmission stared jerking. Power caught back up and lunged forward. At times the engine stalls and catches back up. At times when you put it in gear it feels like the power train is bumping as though your getting stuck are hit from behind.

- Lawrenceville, GA, USA

problem #217

Aug 212013

F-150 6-cyl

  • 34,920 miles


Ford F150, 3.5L ecoboost engine- while driving in rain, vehicle hesitated and misfired, with an associated check engine light on some occasions and not on others. Seemed to happen after cruising and attempting to pass another vehicle. Was unable to accelerate and continued to slow to 50mph. Had to ease on the throttle to slowly accelerated after the condition cleared. Vehicle in the shop 4 times for updates, 3 for changes to the intercooler and the last was for a change of the catalytic converter.

- St. Augustine , FL, USA

problem #216

Mar 072013

F-150 6-cyl

  • 7,000 miles
The contact owns a 2012 Ford F-150. The contact stated that while driving 65 mph and attempting to switch lanes, the vehicle began to lose power and engaged into limp mode. The contact pulled the vehicle over, shut off the engine and once restarted, it functioned properly. The vehicle was taken to the dealer for inspection where they stated that the computer needed to be reprogrammed. The vehicle was repaired but the failure recurred. The manufacturer was not notified of the failure. The failure mileage was 7,000.

- Midland, TX, USA

problem #215

Jan 192014

F-150 6-cyl

  • 37,151 miles
Since new my fuel mileage has been declining and I was experiencing a shudder, with no check engine light (cel). Dealer performed a tsb and replaced the charged air cooler and reprogrammed the PCM. This left me with worse mileage and a noticeable loss of power. This progressed until 1-19-14 where I lost engine power and the engine began to shudder when trying to accelerate to pass a slower moving car. When I floored it, the trans shifted down to 2nd, and the engine shook and the truck slowed. Once I left my foot off the gas, and coasted for 30 seconds, it returned to normal, unless I floored it again. No cel was observed until the next day on the way to the dealer. They replaced all 6 spark plugs due to fouling. I think there is water ingestion issue and that is what caused the plugs to foul. My concern is that if I had been in front a fast moving vehicle, I may not have been able to accelerate and gotten rear ended.

- Farmington Hills, MI, USA

problem #214

Feb 102014

F-150 6-cyl

  • 25,100 miles
I was driving my F150 2012 ecoboost on an onramp getting on to the freeway. It was raining, wet and about 50 degrees. I accelerated from about 35 to 65 mph to change lanes and get in line with traffic. The engine lost power and the truck started shaking. There was about a mile stretch where the vehicles power was completely unpredictable. When I let my foot off the gas the truck would stop shaking. This was very scary as cars were bearing down on me from behind and I had to get over to the far right lane incase I needed to come to a stop. The vehicle then seemed to function normally and I drove about 5 miles straight to the Ford dealership.

- Davis, CA, USA

problem #213

Aug 142013

F-150 6-cyl

  • 19,000 miles
1st time happened when trying to pass a big truck, pick up lost engine power during acceleration that I barely made it, opposite traffic coming, vehicle lost all chances to made on time I was afraid not to pass on time this is a hazard issue if it happens again, I had to stop and shut down vehicle because I had a engine check massage at the main screen of dashboard with the wrench character image, after I restart vehicle everything was normal. 2nd time happen when made trip to Texas on December 2013, when trying to enter freeway I had to speed up and suddenly pick up again lost power and start shaking I could no gain any more speed over 50-55 mph I almost got rear end it by a car on the back that was already in the high speed stream. This time the check engine came on, ;later started to drive ok. When I came back to home town I took vehicle to check the check engine light at autozone and retrieve the P0430 code. I took vehicle to dealer because still under warranty and explain everything. They check vehicle and retrieve the same code, they replaced only the driver side catalytic converter. I was researching on forums and they commonly have to replace not only cat but have to change intercooler, change plugs and re-flash ECU and or place a deflection plate on current intercooler but home town dealer only replace cat, I don't think this will fix issue. Please push Ford to address this issue, for experience this needs to be classified as a recall because safety issue is involved when you lost power when is need it. The actual intercooler on pre 2013 is not good because tends to accumulate condensation and this is sucked under boost condition and probably causing multiple misfires that leads to unexpected power lost and vehicle shaking. My wife and I bought this F150 new on 2012 ecoobost engine re great but this issue needs to be addressed.

- Garden City, KS, USA

problem #212

Jun 192013

F-150 6-cyl

  • 14,522 miles
When passing and increasing speed, vehicle lost acceleration. No accident occurred but could have caused a head on or other accident.

- Aitkin, MN, USA

problem #211

Jan 202014


  • 17,847 miles
The contact owns a 2012 Ford F-150. The contact stated that while driving various speeds, the vehicle shook violently as the check engine warning light illuminated. The vehicle was taken to the dealer and was diagnosed that the turbo for the engine had failed. The vehicle was repaired but the failure recurred fours days later. The vehicle was not repaired. The manufacturer was not made aware of the problem. The approximate failure mileage was 17,847.

- Lino Lakes, MN, USA

problem #210

Jan 242014

F-150 6-cyl

  • 30,301 miles
Jan 24 2014. Morning 6:00 am. My truck stalled on the elgin ohare expressway. I was cruising 65 mph. All of a sudden my trans or engine started to stall. I noticed the indicator on the dash go from 6 gear to 2nd. Gear, my speedometer dropped to 40 then 20 mph. I took my foot off the gas, slowly cruised. Then I put my foot back on the gas and drove to work at 45 mph. Called the Ford dealer made an appointment. Drove it there after work. Left it there for two days. They could not duplicate the incident. They reformatted my digital readout on the dashboard. Deleted the numbers indicating the gear my transmission was in. Therefore they did nothing but cover their[xxx]. information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Chicago, IL, USA

problem #209

Mar 132013

F-150 6-cyl

  • 33,180 miles
Having recurring issues with Ford ecoboost engine on my 2012 F-150. Below is a summary of visits to the dealership for service related issues: 3/13/13- engine light on, shuttering, shaking, and won't go over 70 on highway. Dealership found no issues. 3/29/13- engine light on, shuttering, shaking, and won't go over 70 on highway. Dealership identified issue as bad cac intercooler and replaced per tsb 130303C. 7/9/13- engine light and misfire. Also, transmission slamming forward as if being rear-ended. Dealership coil #2 and spark plug. Not able to verify the transmission slamming?? issue. 10/30/13-filed a complaint with Ford customer service. Still experiencing intermittent cac intercooler symptoms and transmission slamming. 1/3/14- another dealership found that the new cac intercooler had been improperly installed without deflector shield. Also repaired transmission issue. 1/18/13- engine light on. Replaced catalytic converter bank. 1/27/14- contacted Ford customer service with new information. Ford forwarded this information to the regional dealership manager. 2/2/14- still having cac intercooler issues during snow storm. 2/4/14- Ford customer service closed claim. Never contacted by any dealership representative regarding my concerns. I feel that I am getting the run around from Ford on this particular matter. I do not think they are taking the issues with these F150 trucks seriously enough. No permanent fix for the problem has been found, at least not with my truck. I am also concerned that you can take your vehicle to one dealership where they cannot identify a transmission issue, but another one can. Furthermore, it concerns me that this intercooler problem can create a safety issue on the roadway, yet, the dealership makes a repair without installing all of the necessary components.

- Ida, MI, USA

problem #208

Dec 212013

F-150 6-cyl

  • 38,500 miles
I was travelling on a 4-lane, 65mph highway when I floored the gas pedal. The truck failed to accelerate as it should have. Instead, it acted as if it was coasting. There was no power for several seconds even when I moved the gas pedal to different positions. When the truck finally seemed to resume power, it started to shake violently. The shocked passenger and I looked at each other, then I checked to see if there were parts strewn on the road behind me. Suddenly, it smoothed out and there were no more issues on that trip. I had been driving that truck for about 10 hours with various forms of precipitation at the time. This was December 21, 2013. The second incident was on December 28, 2013. Weather conditions were sunny and dry. I had been driving about 50 minutes. I floored the gas pedal again to overtake a vehicle and was barely able to overtake due to no power. Again, I worked the throttle to no avail. The truck finally recovered but started shaking violently again. As before, it smoothed out. I took my truck to a local Ford dealership where they told me it was showing no codes and that their techs could not reproduce the symptoms I had mentioned. I checked on NHTSA website and found this issue is under investigation. I do not agree with the service bulletins. My theory is that there is a computer programming problem specific to this direct-injection, turbo gasoline engine. I plan on trading for something other than an ecoboost engine, as this problem is dangerous.

- New Burnside, IL, USA

Read the next 20 complaints »

Not what you are looking for?