Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Ford Mustang owners, lightly cleaned up (personal details are redacted by NHTSA).
Takata my car has different manufacturing issues including the convertible roofing it does openly by itself, I got scared and chocked the first time it happened, also the transmission seemed to sent a lower speed to the motor. Airbag didn't explode in a crash. Driving is when it happens.
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. …
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 $145.00 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.
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.
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.
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.
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.
Throttle body malfunction - causes loss of power while driving. Acts as though you took your foot off the gas pedal. Engine will not rev above idle speed. Check-engine light comes on. If you stop, turn off the car, and re-start, it will be OK for a while. It happened to me twice in 2 weeks. Part was replaced, but the new part failed again in 16 months. Had that replaced this week. (May '17). I am aware of Ford customer satisfaction program 16b23, but the dealer said my VIN was not one of the affected vehicles. I beg to differ.
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.
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.
Fuel System complaints in other Mustang years
Frequently asked questions
How common are fuel system problems on the 2012 Ford Mustang?
NHTSA has 22 complaints about the fuel & propulsion system of the 2012 Ford Mustang, 5% of the model year's 469 complaints.
Is there a recall for 2012 Ford Mustang fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 2012 Ford Mustang, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2012 Ford Mustang fuel system problems start?
Half of the complaints with a recorded mileage happened before about 57,000 miles, and 19% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 1 injury to fuel & propulsion system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.