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:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
36,786 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 Mustang engine problems

engine problem

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

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

2012 Ford Mustang Owner Comments (Page 1 of 2)

problem #24

Sep 012016


  • 80,000 miles


The contact owns a 2012 Ford Mustang. While driving various speeds, the wrench sensor and check engine sensor indicators suddenly illuminated. The vehicle also failed to accelerate normally. The cause of the failure was not diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The VIN was not available. The failure mileage was 80,000.

- Houston, TX, USA

problem #23

Sep 162016


  • 70,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that the vehicle experienced a complete loss of power and the maintenance warning indicator illuminated. The vehicle was taken to the dealer where it was diagnosed that the electronic throttle body was defective and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 70,000.

- Roseville, CA, USA

problem #22

Jul 012016


  • 58,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that the vehicle randomly stalled without warning. The contact was able to get the vehicle to restart, but it stalled more than three times afterwards. The vehicle was taken to a dealer where it was diagnosed that the throttle body needed to be replaced. The manufacturer was notified of the failure and provided no remedy. The approximate failure mileage was 58,000.

- Fort Lauderdale, FL, USA

problem #21

May 032016


  • 69,000 miles


While driving car suddenly loses power and shows wrench light and goes into limp mode. Trouble codes shown P2111 and P2112. This can happen any time during driving and has happened in heavy traffic potentially dangerous consequences.

- Charlotte, NC, USA

problem #20

Apr 262016


  • 18,500 miles
During initial acceleration after a left turn, shifting from 1st into 2nd gear, the vehicle shook wildly and violently rocked side to side and lost power. This was the second identical occurrence on city streets while accelerating out of left turns. On both occasions, had to make immediate moves to the right lane before power was restored. Based on other reporting and research, it appears to be an issue of throttle body failure. The vehicle has 18,500 miles and has a mt-82 transmission.

- Ocala, FL, USA

problem #19

May 092015


  • miles
Was driving around 50mph on city streets when all of a sudden car lost power and went limp. Wrench light came on and car was making a weird noise under the hood like it was struggling. Couldn't accelerate and I had to coast to the right hand side of the road. Turned the car off and then back on and everything was okay. This has happened 3 times since within a 8 month time period driving at various speeds. Each time I turn the car on & off again and it seems to reset. I've noticed my car hasn't been getting the same city mpg as before. Ive only had this car 2 years, I'm the second owner and this started at roughly 62,000 miles.

- Fresno, CA, USA

problem #18

Oct 222015


  • 18 miles


Wrench light comes on, followed by check engine light. Car goes into fail safe mode, down to about 2 mph; rpms fluctuate dramatically. Happens on the highway, and during normal street driving. Seems to be in the throttle, the same thing as in the recalled Ford Focus throttle plate actuator.

- Metairie, LA, USA

problem #17

Oct 072015


  • 56,000 miles
I was driving in the expressway at 60 mph when suddenly my car lost power on the acceleration. A wrench tool appear and the dashboard on the RPM clock... at that moment the car desaccelerate almost to 30 mph and I was unable to gain speed. I went to a side of the road, turn it off and restarted the car. Everything appear to be normal but the first thing I did was go to the dealer. They run a test on it and told me that the problem was related to the electeic throttle body. I dont understand how is possible to happend something like that when my car barely has 4 years. There is no warranty on ot and the repair for it is really expensive.

- Miami Lakes, FL, USA

problem #16

Jul 282015


  • 61,453 miles
Failure of the throttle body assembly. The vehicle went into the "limp home mode" similar to the recall of Ford escapes and others with same V-6 engine assembly.

- Gulf Breeze, FL, USA

problem #15

Jul 202015


  • 60,000 miles
While entering the freeway in rush hour traffic, my car went into "limp mode", the wrench light came on as did the check engine light. I had to pull over on the shoulder of the freeway, turn the engine off and restart it. This has happened a couple of times in the past couple of days- mostly while driving on the freeway. It is very scary to be driving on a houston freeway, have this happen and need to safely maneuver a vehicle to the shoulder of the freeway, often crossing several lanes of traffic when vehicles are moving at 40-55 mph and I have no ability to accelerate. I have also had to stop in the middle of the freeway to restart my car because I was not able to safely change lanes. It was a terrifying experience and I was afraid I would be re-ended by motorist driving at posted speeds. When researching this issue, along with the mariner's, escapes, Focus etc, I have found that many Ford Mustangs have this same problem. Given that this is a very dangerous condition, the cost involved in replacing the throttle body, and most importantly, Ford's long history of vehicles with defective throttle bodies, I do not understand why the 2012 Mustang or any other Ford product with this issue are not automatically eligible for the "customer satisfaction program" which fixes the problem. I do not trust this car and no longer feel safe in it.

- Houston, TX, USA

problem #14

May 052015


  • 29,000 miles


The contact owns a 2012 Ford Mustang. The contact stated that the vehicle stalled without warning. The vehicle was taken to the dealer where the technician diagnosed the electronic throttle body needed to be replaced. The repair was made to the vehicle. The manufacturer was made aware of the failure. The failure mileage was 29,000.

- Fort Myers, FL, USA

problem #13

May 132015


  • 75,000 miles
While merging on a local highway at 15 mph the wrench warning light came and the car went into limp mode. I was lucky the right hand lane had break in traffic and I was able to get off the road. The limp turned in no acceleration and was unresponsive to the gas pedal. I turned the car off and waited 1 minute and restarted the car - everything was back to normal. I drove directly to my mechanic and had him scan for codes. No codes were found. He ran numerous other checks and drove the car for 60 miles with no problems. This is the second time the wrench warning light has come on in the last 3 weeks. The first time nothing happened as the car did not go into limp mode. The car was scanned then also with no codes showing. I was fortunate not to have been hit.

- Spring Branch , TX, USA

problem #12

Dec 202014

Mustang 6-cyl

  • 60,300 miles
Driving down the highway full speed in heavy traffic, and engine just shuts down. Wrench light and check engine light come on. Have to coast through traffic to pull off to the side of the road and stop. Restart the car a couple of times, and then it's fine. Took to Ford dealer, who said I had a bad throttle body. Charged over $800 to repair. Completely losing power while driving down the highway is definitely a safety issue! Ford has agreed to fix defective throttle bodies on other models, but not the Mustang. This really looks like the same problem, and should be addressed by Ford.

- San Antonio, TX, USA

problem #11

Nov 012014

Mustang 6-cyl

  • 64,700 miles
While my son was driving on the freeway, the vehicle suddenly decelerated, down to about 20 mph, forcing him to limp to the side of the freeway, where there was no shoulder. After turning the vehicle off, letting it sit for a minute, and turning it back on, it accelerated fine. I took it to the Ford dealership, where it was diagnosed as a faulty throttle body and motor assembly. It cost $683.32 to repair. I googled the problem and found that many Ford models have had this problem, but the Mustang has no extended warranty for this same problem like the Fusion and a few other models do. This was terribly dangerous. My son could have been killed.

- Magnolia, TX, USA

problem #10

Jul 212014

Mustang 6-cyl

  • 52,000 miles
2012 Ford Mustang throws check engine light and wrench going into "limp mode" (car cuts all acceleration, and just idles). I had to pull to the side of the road, and shut vehicle off. Vehicle returned to normal after one or two turn ons. This will occur every other day, and multiple times in a day. Very dangerous if it was to happen while merging in traffic. This is not covered under Ford powertrain or emissions warranty, they claim that it is an "attachment" to the engine, not a part of it. This issue has caused them to extend their warranties on the Ford escape and Fusion, but not their other vehicles affected by this issue. They have quoted me $700 dollars to completely replace the throttlebody. This is a very dangerous issue, that is linked to more than just the Ford escape and Fusion, and Ford has not given their other vehicles owner's the same warranty.

- Weirsdale, FL, USA

problem #9

Jun 092014


  • 22,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that while driving 70 mph, the vehicle stalled without warning. The vehicle was not able to restart. The vehicle was towed to the dealer where the technician was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 22,000 and the current mileage was unknown. The VIN was not available.

- Baton Rogue, LA, USA

problem #8

May 302013


  • 22,000 miles
The contact owns a 2012 Ford Mustang. The contact stated that while driving 70 mph the vehicle stalled without warning. The vehicle was taken to the dealer where the technician was unable to diagnose a failure. No repairs were made to the vehicle and the manufacturer was made aware of the failure. The failure mileage was 22,000.

- Baton Rogue, LA, USA

problem #7

May 012013

Mustang 6-cyl

  • 16,000 miles
Upon taking off from a stop light car stalled and lost all engine power. Car started again but stalled just as guiding to breakdown lane on overpass. Had to have car towed to Ford service where they determined it was a bad throttle body. Throttle body was replaced. Ford service spoke of known issues with the throttle body in Focus models but was not aware of any throttle body issues with Mustang.

- Casselberry, FL, USA

problem #6

Nov 012011


  • 7,000 miles
The contact owns 2012 Ford Mustang. The contact stated the engine light remained illuminated. The vehicle was taken to the dealer and a diagnostic test was performed; which located the failure in the engine block due to premature oil consumption. The engine block was replaced; however, the failure was not corrected. The engine block continued to consume oil prematurely. The manufacturer was made aware of the failure. The failure mileage was 7,000. The current mileage was 11,000.

- Rancho Cucamonga, CA, USA

problem #5

Feb 022013

Mustang 6-cyl

  • 14,000 miles
It was a clear and warm day in southern California. Roads had no dirt, water, debris, etc..I was driving about 35-40 and had just gone in to 4th gear. My 2012 V6 Mustang suddenly swerved to the left really hard forcing me in to the left lane and almost in to another vehicle. Then to the right which almost made me lose control. Felt like each tire was locking up independently. The traction control light was flashing. Felt like I got a flat and that my car was braking all by itself. I tried to throttle up a second later to get out of traffic and it had no response. I could not accelerate when pulling over I hit the brakes and they sounded like metal on metal, felt rough and like the ABS was engaging. Once stopped I checked the tires and all were fine. I turned off the engine and waited a second. Turned it back on and all seems fine. This made me almost crash in to another car!!!! there are a lot of people on forums like this one complaining about the same issue.

- Colorado Springs, CO, USA

Read the next 4 complaints »

Not what you are looking for?