NHTSA owner reports · September 18, 2026 snapshot.
Vehicle Speed Control complaints
14 reportsClear category filter80,000 miles · Aug 9, 2024
Fuel System, GasolineVehicle Speed Control
The contact owns a 2006 Mercury Montego. The contact stated that while parallel parking, the vehicle independently accelerated and lunged forward. There were no warning lights illuminated. The contact stated that the failure was due to the throttle body. The local dealer was not contacted. The vehicle was not diagnosed or repair…
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The contact owns a 2006 Mercury Montego. The contact stated that while parallel parking, the vehicle independently accelerated and lunged forward. There were no warning lights illuminated. The contact stated that the failure was due to the throttle body. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 80,000.
NHTSA ODI #11607562
Mileage unknown · Aug 16, 2022
Power TrainVehicle Speed Control
The throttle control transmission has failed me several times when I’m on the road. Thankfully it’s only left me stranded on the side of the freeway once but has made me stop during oncoming traffic several times. The wrench light comes on when the vehicle decelerates and I’m unable to accelerate. Once the steering wheel even lo…
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The throttle control transmission has failed me several times when I’m on the road. Thankfully it’s only left me stranded on the side of the freeway once but has made me stop during oncoming traffic several times. The wrench light comes on when the vehicle decelerates and I’m unable to accelerate. Once the steering wheel even locked. This happens at random times but because the code is pending mechanics can’t seem to find the issue. This has happened dozens of time where it just stops suddenly while driving. I am concerned for the safety of me and my family when driving this vehicle. Please get this issue resolved!
NHTSA ODI #11479541
145,000 miles · Jan 7, 2020
Vehicle Speed Control
MY CAR GOES INTO LIMP MODE WHEN THE CRUISE IS SET AND IT APPROACHES ANY INCLINE.
NHTSA ODI #11297596
82,300 miles · Jun 6, 2019
Vehicle Speed Control
TL* THE CONTACT OWNS A 2006 MERCURY MONTEGO. WHILE DRIVING WITH THE CRUISE CONTROL ACTIVATED, THE CONTACT DEPRESSED THE BRAKE PEDAL TO SLOW DOWN, BUT THE VEHICLE FAILED TO STOP. THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD WHEN IT WAS DEPRESSED AND THE VEHICLE FELT AS IF THE VEHICLE WERE ACCELERATING. THE CONTACT STATED THAT THE V…
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TL* THE CONTACT OWNS A 2006 MERCURY MONTEGO. WHILE DRIVING WITH THE CRUISE CONTROL ACTIVATED, THE CONTACT DEPRESSED THE BRAKE PEDAL TO SLOW DOWN, BUT THE VEHICLE FAILED TO STOP. THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD WHEN IT WAS DEPRESSED AND THE VEHICLE FELT AS IF THE VEHICLE WERE ACCELERATING. THE CONTACT STATED THAT THE VEHICLE WAS OUT OF CONTROL. THE CONTACT WAS ABLE TO PULL THE VEHICLE OVER AT 60-65 MPH AND QUICKLY POWERED OFF THE ENGINE. WHILE THE VEHICLE WAS IN NEUTRAL, THE CONTACT RESTARTED THE VEHICLE AND IT OPERATED NORMALLY. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 82,300.
NHTSA ODI #11218236
123,000 miles · Mar 20, 2014
Electrical SystemEngineVehicle Speed Control
WHEN DRIVING THE CAR COMES TO A SUDDEN STOP AND ONLY ALLOWS ME TO GO 20-25 MPH. VERY UNSAFE. I WAS ON THE FREEWAY GOING ABOUT 65MPH AND THEN ENGINE LOST POWER - SPEED DROPPED TO 20 MPH ON THE FREEWAY. LUCKILY I WAS ABLE TO PULL OVER IN TIME AVOID A HIGH SPEED COLLISION. THE SUDDEN ENGINE POWER LOSS HAPPENS GOING AT DIFFERENT SPE…
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WHEN DRIVING THE CAR COMES TO A SUDDEN STOP AND ONLY ALLOWS ME TO GO 20-25 MPH. VERY UNSAFE. I WAS ON THE FREEWAY GOING ABOUT 65MPH AND THEN ENGINE LOST POWER - SPEED DROPPED TO 20 MPH ON THE FREEWAY. LUCKILY I WAS ABLE TO PULL OVER IN TIME AVOID A HIGH SPEED COLLISION. THE SUDDEN ENGINE POWER LOSS HAPPENS GOING AT DIFFERENT SPEEDS EVEN AS SLOW AS 30 MPH. THE RPM NEEDLE GOES UP AND DOWN. I HAVE HAD THE THE THROTTLE BODY CLEANED AT THE DEALER FROM A PREVIOUS RECALL, AND HAVE GOTTEN THE THROTTLE BODY CLEANED AGAIN. *TR
NHTSA ODI #10573749
36,000 miles · Jul 4, 2013
EngineExterior LightingStructureCrash
AS I BACKED OUT OF A PARKING SPACE, THE CAR SURGED & I HIT ANOTHER PARKED CAR BEHIND ME. EVEN THOUGH I HAD MY FOOT ON THE BRAKE, THE CAR ACCELERATED FOR A FEW SECONDS. I THEN PLACED THE OTHER FOOT ON TOP OF THE RIGHT FOOT & PUT THE GEAR INTO PARK & THE CAR STOPPED. *TR
NHTSA ODI #10523202
94,500 miles · Jul 20, 2012
EngineVehicle Speed Control
CAR WAS COMPLETLY STOPPED AT A RED LIGHT. THEN ALL OF A SUDDEN THE CAR LURCHED FORWARD 5 FEET WITH FOOT ON THE BRAKE. THIS MAKES THE 3RD OR 4TH TIME IN THE PAST YEAR IT HAS HAPPENED. LUCKY NO ONE WAS IN FRONT OF ME. *TR
NHTSA ODI #10466831
80,000 miles · Jul 13, 2012
Vehicle Speed Control
TL* THE CONTACT OWNS A 2006 MERCURY MONTEGO. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT DEPRESSED THE BRAKE PEDAL UPON APPROACHING A TRAFFIC STOP SIGNAL. THE VEHICLE SUDDENLY LUNGED FORWARD WITHOUT WARNING. THE FAILURE RECURRED WHENEVER THE BRAKE PEDAL WAS ENGAGED DURING A COMPLETE STOP. THE FAILURE BECAME PROGRESSIVELY WO…
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TL* THE CONTACT OWNS A 2006 MERCURY MONTEGO. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT DEPRESSED THE BRAKE PEDAL UPON APPROACHING A TRAFFIC STOP SIGNAL. THE VEHICLE SUDDENLY LUNGED FORWARD WITHOUT WARNING. THE FAILURE RECURRED WHENEVER THE BRAKE PEDAL WAS ENGAGED DURING A COMPLETE STOP. THE FAILURE BECAME PROGRESSIVELY WORSE. THE VEHICLE HAD NOT BEEN DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 80,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10465563
92,903 miles · Jul 11, 2012
Vehicle Speed Control
I EXPERIENCE A SUDDEN ACCELERATION WHEN I AM PULLING INTO OR BACKING OUT OF A PARKING SPACE AND PULLING INTO MY DRIVEWAY. I PURCHASED THIS CAR USED TWO YEARS AGO, SO IT MIGHT NOT BE THE FIRST OCCURRENCE. *TR
NHTSA ODI #10465332
60,000 miles · Jul 25, 2011
Vehicle Speed Control
OUR 2006 MERCURY MONTEGO LUNGES, AND SUDDENLY ACCELERATES WITH NO FOOT PRESSURE ON THE GAS PEDAL. IT IS CLEARLY A MISSED RECALL WITH ISSUES WITH THE THROTTLE BODY. FORD KNOWS ALL ABOUT THIS ISSUE AND SO DO YOU.....I AM NOT THE FIRST TO COMPLAIN! DO SOMETHING BEFORE SOMEONE GETS KILLED! THE FOLLOWING SITE EXPLAINS IT ALL==> HTTP:…
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OUR 2006 MERCURY MONTEGO LUNGES, AND SUDDENLY ACCELERATES WITH NO FOOT PRESSURE ON THE GAS PEDAL. IT IS CLEARLY A MISSED RECALL WITH ISSUES WITH THE THROTTLE BODY. FORD KNOWS ALL ABOUT THIS ISSUE AND SO DO YOU.....I AM NOT THE FIRST TO COMPLAIN! DO SOMETHING BEFORE SOMEONE GETS KILLED! THE FOLLOWING SITE EXPLAINS IT ALL==> HTTP://WWW.FACEBOOK.COM/PAGES/FORD-FREESTYLE-500-MERCURY-MONTEGO-THROTTLE-BODY-RECALL/114094741973972?SK=WALL. *TR
NHTSA ODI #10415009
NHTSA investigations
1PE11018 · Idle Instability
Opened May 11, 2011 · Closed Feb 7, 2013
Status: closed (inferred from source dates) · Vehicle Speed Control
On November 29, 2012, Ford Motor Company (Ford) initiated Customer Satisfaction Program 12N03 to extend warranty coverage terms for repair of engine idle RPM surge caused by throttle body deposits in all model year (MY) 2005 through 2007 Ford Freestyle, Five Hundred and Mercury Montego vehicles.The program extends the coverage for up to 10 years of service or 150,000 miles from the warranty start date of the vehicle (all vehicles are eligible for the program through May 31, 2013, regardless of mileage).Dealers will repair vehicles exhibiting the condition by removing and cleaning the throttle body and reprogramming the PCM with software containing an updated idle speed control strategy.According to Ford, some of the affected vehicles may experience momentary, intermittent engine idle RPM surge (idle flare) when stopped or during low speed driving maneuvers such as in a parking lot or driveway.Unstable idle speed control (dips and flares) around the target engine speed (700 rpm) can occur in vehicles with deposit build-up in the throttle body when the system adjusts engine speed in response to changes in engine load, typically from power steering application or air-conditioner compressor cycling.Idle speed control logic is only active at vehicle speeds below 3.5 mph and when the accelerator pedal is not applied.Ford testing of a vehicle with a worst case throttle body measured a maximum idle flare of 1360 RPM lasting approximately 1 second, which Ford indicated was consistent with system design to limit vehicle speed and acceleration in idle control mode.Ford indicated that the test vehicle was held in place with normal brake effort and that vehicle speed remained under 4 mph without the brake pedal applied.In addition to throttle body deposit accumulation, symptoms associated with the condition may include Check Engine lamp illumination and diagnostic trouble codes (DTCs) P0505, P0506 or P061B.Ford attributed the surge condition to changes in idle air flow resulting from the progressive buildup of deposits in the throttle body from normal Positive Crankcase Ventilation (PCV) system operation.This condition was not adequately compensated for in the original Powertrain Control Module (PCM) calibration.Ford issued a technical service bulletin on August 15, 2011 (TSB 11-8-5), releasing an updated powertrain control calibration for vehicles with CVT transmissions.On October 19, 2011, Ford issued a second bulletin (TSB 11-10-21) superseding TSB 11-8-5 and including updated powertrain control calibration for vehicles with 6-speed transmissions.Prior to Ford issuing the TSB?s, owner?s experiencing the alleged defect either received no repairs, if dealers could not duplicate the condition, or had the throttle body cleaned or replaced, which only provided temporary correction until the throttle deposit build-up returned.Ford?s revised powertrain calibrations appear to be effective remedies for the idle instability caused by build-up of throttle body deposits.However, even after the TSB?s were released, many owners experiencing the condition continued to have difficulty with proper diagnosis and repair as dealers were often either unable to duplicate the condition or were unfamiliar with the new repair procedures.Ford's new program addresses those concerns.NHTSA's testing and complaint analysis indicate that the idle speed control issue in the subject vehicles can only occur at very low speeds, are very brief events, are easily controlled by moderate brake pedal forces and result in minor increases in vehicle speed even with no braking.This investigation is closed.The closing of this in
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