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.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
46,256 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 fuel system problems

fuel system problem

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2012 Ford Mustang Owner Comments

problem #14

Aug 012016


  • 80,000 miles


On August 1, 2016, at approximately 7:30 P.M., I was driving South on U.S, highway 1 (Y, S, highway 2 is a 3-lane road). Suddenly, my vehicle lost the poser to accelerate. I was panicked, as there was traffic behind me and to my left side. I could do nothing to stop the loss of acceleration. Fortunately, my friend as following me and was immediately aware that I was having a problem. My friend immediately put on his emergency flashers; as I slowed, I was able to pull off to the side and coast into a filling station. At this time, I noticed two things; the car ran roughly at a very slow speed and a wrench symbol appeared on the dash. I was able to pull to a safe location on the filling station lot. My friend searched for the symbol in the owner's manual which indicated there was a throttle control problem and I should contact my dealer immediately. At this time, I called aaa and was advised that a tow truck would be there in approximately an hour and a half. When the tow truck arrived, I completed the paperwork and the car was take to paradise Ford where I purchased it in 2012. The following morning, Ford called me and diagnosed it as a defective throttle body assembly and replaced it. Some research indicated that a tsb had been issued to Ford dealers about the malfunction of this item. Because in my case, this was an obvious safety issue, I feel Ford should have notified me and given me the opportunity to have it replaced under warranty. As a result of this, I was charged $621 for the repair. To reiterate, the main issue here is that in an unsafe situation due to, what I perceive, as the Ford dealer's negligence.

- Melbourne, FL, USA

problem #13

Apr 212016


  • 22,000 miles
Intermittently, while driving at any speed the vehicle will go into 'limp home mode'. the 'wrench' trouble light illuminates on the dash. The vehicle then has to be stopped completely, put into park and shut off. The vehicle then starts after a few extra cranks of the starter and runs normally. The 'wrench light is no longer lit and no engine code is stored. My mechanic cannot troubleshoot the problem because no engine error code is stored. Research on-line points to defective throttle body as the culprit with replacement as the solution. Ford should add the Mustang to its customer satisfaction program for defective throttle bodies. I understand some 1.6 million vehicles are already on this list. The problem began for me about a year ago around the 18K mile mark and the vehicle now has about 22K miles on it, is meticulously maintained and cared for. This is a very dangerous defect that we, as owners, could at least address properly if there was an engine error code reported. I am going to have the throttle body replaced at my own expense based on what others have reported, since there is no known fix from Ford. I did report this to Ford customer service today 04/23/2016. They confirmed they are unaware of any problem with Mustang throttle bodies. I recommend that Ford put some engineers on this and remedy the problem. In the meantime, we Mustang owners with cars out of warranty are having to fend for ourselves.

- Rockport, TX, USA

problem #12

Mar 302016


  • 57,187 miles
Went to stop and had to put car into neutral before car stopped because gas petal would not release.

- Shreveport, LA, USA

problem #11

Jan 182016


  • 59,000 miles


My vehicle constantly goes into limp home mode while driving. Turns off all cylinders except 1 which let's you drive about 5mph. Also while my vehicle is at idle it begins to loose proper idle RPM and nearly stalls until revs back to a higher RPM. After some research I found that the issue is thought to be the throttle body and throttle body sensor. Currently mymy vehicle is at the dealership going through some vehicle diagnostics to figure out the exact problem. They told me it is not covered under the vehicle warranty and I am being charged $145 for the initial inspection and then charged by the hour to fix the problem, I not including parts. My vehicle only has 59,000 miles on it and it's already failing. It appears that numerous people are have this issue and Ford has yet to recall affected vehicles.

- Vacaville, CA, USA

problem #10

Jan 082016


  • 78,000 miles
When put in gear, it jerks forward.gas accelerates suddenly with out times, pedal will not rev up car.error when tested was throttle scensor

- West Union, SC, USA

problem #9

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 #8

Sep 082015


  • 52,954 miles


While driving expressway speeds in the center lane of a busy expressway the vehicle abruptly went into limp mode and loss of all acceleration. Had to coast to get to right hand lane/shoulder. Took car to dealership and they said the throttle body had to be replaced. As a side note, I had the fuel injectors and throttle body cleaned just over a year ago. I don't understand why the Mustang is not covered under Ford's "customer satisfaction program" that is being offered for faulty throttle bodies in other models as the unsafe symptoms and results were identical, I.e. car driving highway speeds abruptly goes into limp mode and loss of all acceleration.

- Cypress , TX, USA

problem #7

Aug 242015


  • 42,000 miles
I was accelerating when suddenly there was no more power, the "wrench" light came on. I was able to get to the side of the road. Turned off the engine and restarted the engine. The problem then went away however reoccurred about six times since with the same symptoms. I had a mechanic run a diagnostic test which revealed a faulty throttle body. Ford dealer has not agreed to replace, did say that they would match any lower price for the part so that there would be a 2 year Ford warranty. Since there are seven other complaints on this car and it is a serious safety hazard, it seems like they should replace the part.

- Tamarac, FL, USA

problem #6

Jul 082015


  • 50,000 miles
The vehicle has gone into limp mode several times. The wrench symbol on the dash comes on and the vehicle must be shut off and restarted. I am told the throttle body must be replaced. Why is there a customer satisfaction program for the escape and other models but not the 2012 Mustang. I own a 2012 Ford escape also and have not experienced the problem with that vehicle. Only experience it with a same year vehicle that is not included in the program. The vehicle is not safe to drive when it shuts down at 45+ mph.

- Englewood, FL, USA

problem #5

Jul 122015


  • 61,000 miles
Driving down the road and the electronic throttle wrench light come on and car went into limp mode. It has happened 3 times since. Once going down a 4 lane highway in rush hour traffic and car just stalls. I had to get over in far lane and get off road as cars were flying up on me and around me.

- Benson, NC, USA

problem #4

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 #3

Oct 202014


  • 19,000 miles
Entering into traffic, the car will go into limp mode. There was no response from the gas pedal and the car just cruzed at a snail pace. Very dangerous situation, as the traffic was moving and I barely moved out of the way. Since, I had 4 occurrences and taken it to the dealer. They will not work on the car unless the check engine sign stays on. The car computer will reset everytime you start the car. I had the car tow to the dealer the first time and subsequent events, but as I mentioned the dealer did not wanted to recognize the situation.

- Miami, FL, USA

problem #2

Sep 042014


  • 39,000 miles
At approximately 60 mph on I-295 in moderately heavy traffic, there was an audible "clunk" and vehicle immediately began decelerating. Pressing on the gas pedal did not power the vehicle. Driver was already in the far right lane preparing to exit, so safely made it to the shoulder. Had driver been in another lane, there would be significant risk of collision as the vehicle lost power so quickly. Vehicle was towed to Ford dealer, who reported that the throttle body had failed. Ford denied that throttle body failure was a common issue with the Mustang, although it has been in several other Ford models.

- Jacksonville, FL, USA

problem #1

Feb 162013

Mustang 6-cyl

  • 12,422 miles
On February 16, 2013 on a clear sunny day, without warning (no check engine light or other visible/audible signal), my Mustang began to sputter and die while driving at 65 mph on a local freeway in the fast lane. Efforts to downshift and rev the engine to keep it alive failed. I was forced to pull the vehicle hard over to the breakdown area in the center of the highway just as the engine completely died. Efforts to restart it failed - the engine cranked, but would not turn over. My family (including a 4 year old) were was stuck for 45 frightening minutes waiting for a tow as vehicles whizzed by.

- Antioch, CA, USA

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