NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
104 reportsClear category filter102,000 miles · Oct 30, 2011
Power TrainVehicle Speed Control
THE VEHICLES WARNING INDICATOR LIGHT OF A WRENCH LIT UP INDICATING TRANSMISSION/THROTTLE BODY SERVICE. HAD PREVIOUSLY HAD TRANSMISSION INSPECTED AND WERE NO PROBLEMS. THE CAR WILL THRUST IN DIRECTION CAR IS IN GEAR OF SUCH AS WHEN CAR IS IN REVERSE IT WILL THRUST AND LUNGE BACKWARDS ALSO IN DRIVE LUNGE FORWARDS. IT ALSO IS ENHAN…
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THE VEHICLES WARNING INDICATOR LIGHT OF A WRENCH LIT UP INDICATING TRANSMISSION/THROTTLE BODY SERVICE. HAD PREVIOUSLY HAD TRANSMISSION INSPECTED AND WERE NO PROBLEMS. THE CAR WILL THRUST IN DIRECTION CAR IS IN GEAR OF SUCH AS WHEN CAR IS IN REVERSE IT WILL THRUST AND LUNGE BACKWARDS ALSO IN DRIVE LUNGE FORWARDS. IT ALSO IS ENHANCED WHEN THE CARS HEATER OR A/C IS RUNNING. HAVE RESEARCHED AND MANY, MANY PEOPLE HAVE HAD SIMILAR PROBLEMS AND COMPLAINTS. *TR
NHTSA ODI #10433615
68,690 miles · Oct 12, 2011
Power TrainVehicle Speed ControlCrash
I'M NOT SURE IF THIS IS A POWER TRAIN OR OTHER PROBLEM, CAR LURCHES DANGEROUSLY AT LOW SPEEDS, AND WHEN CHANGING GEAR INTO AND OUT OF REVERSE. I HIT A POST PARKING IN AUGUST OF 2010 DUE TO THIS, AND IT'S BEEN GETTING GRADUALLY WORSE. TOOK IT TO THE DEALER WHO REPLACED A BROKEN UPPER MOTOR MOUNT THAT WAS CONNECTED TO THE TRANSM…
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I'M NOT SURE IF THIS IS A POWER TRAIN OR OTHER PROBLEM, CAR LURCHES DANGEROUSLY AT LOW SPEEDS, AND WHEN CHANGING GEAR INTO AND OUT OF REVERSE. I HIT A POST PARKING IN AUGUST OF 2010 DUE TO THIS, AND IT'S BEEN GETTING GRADUALLY WORSE. TOOK IT TO THE DEALER WHO REPLACED A BROKEN UPPER MOTOR MOUNT THAT WAS CONNECTED TO THE TRANSMISSION. DIDN'T HELP, ALTHOUGH IT SEEMED LIKE A GOOD GUESS AT THE TIME. IT HELPS TO KEEP FOOT FIRMLY ON BRAKE WHEN CHANGING GEAR OR HOLDING STILL, WHILE THE CAR TRIES TO LURCH FORWARD (OR BACK) WITH UNPLANNED ACCELERATION. SEEMS TO BE GETTING INCREASINGLY WORSE AND NOW I DON'T FEEL IT'S SAFE TO LET ANYONE ELSE DRIVE IT, LIKE AT VALET PARKING. TAKING IT BACK TO DEALER TOMORROW, BUT WE LET WARRANTY EXPIRE RECENTLY DARN IT. WE GET SO MANY FAKE SPAM WARRANTY-EXPIRING PHONE CALLS THAT I GOT CONFUSED AND DROPPED THE BALL. THROTTLE CONTROL MODULE MAY BE GIVING FALSE SIGNAL TO CARBURETOR, NOT SURE WHAT IT IS. *KB
NHTSA ODI #10429546
Mileage unknown · Sep 19, 2011
Power TrainVehicle Speed Control
THE CAR LUNGES IN DRIVE AND REVERSE WITHOUT ACCELERATING. THIS IS DANGEROUS AS WHEN BACKING OUT OF GARAGES OR PARKING PLACES. TRYING TO TAKE OFF SLOWING IS NOT POSSIBLE. *KB
NHTSA ODI #10426263
75,000 miles · Sep 1, 2011
Power Train
TL* THE CONTACT OWNS A 2006 FORD FIVE HUNDRED. THE CONTACT STATED THAT WHILE ATTEMPTING TO ACCELERATE FROM A STOP, THE VEHICLE HESITATED BEFORE QUICKLY ACCELERATING. AN ENGINE FAIL SAFE MODE MESSAGE ALSO ILLUMINATED ON THE INSTRUMENT PANEL AND THERE WAS AN INCREASE IN ENGINE RPMS DURING THE FAILURE. THE FAILURE HAD SINCE RECURRE…
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TL* THE CONTACT OWNS A 2006 FORD FIVE HUNDRED. THE CONTACT STATED THAT WHILE ATTEMPTING TO ACCELERATE FROM A STOP, THE VEHICLE HESITATED BEFORE QUICKLY ACCELERATING. AN ENGINE FAIL SAFE MODE MESSAGE ALSO ILLUMINATED ON THE INSTRUMENT PANEL AND THERE WAS AN INCREASE IN ENGINE RPMS DURING THE FAILURE. THE FAILURE HAD SINCE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP, WHERE THE CONTACT WAS INFORMED THAT THE TRANSMISSION WOULD NEED TO BE REPAIRED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 75,000.
NHTSA ODI #10422887
38,000 miles · Aug 30, 2011
Power Train
THIS CAR IS SCARING ME AND ANYONE ELSE THAT HAS TO MOVE IT IN OR OUT OF A PARKING SPACE OR WHEN APPROACHING A LIGHT OR STOP SIGN. IT LUNGES FORWARD WHEN PUTTING IT IN ANY GEAR AND WHEN AT A STOP. THIS HAS BEEN HAPPENING FOR OVER A YEAR. I AM SO AFRAID SOMEONE IS GOING TO GET HIT OR PROPERTY DAMAGE WILL OCCUR. YOUR FOOT CAN BE P…
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THIS CAR IS SCARING ME AND ANYONE ELSE THAT HAS TO MOVE IT IN OR OUT OF A PARKING SPACE OR WHEN APPROACHING A LIGHT OR STOP SIGN. IT LUNGES FORWARD WHEN PUTTING IT IN ANY GEAR AND WHEN AT A STOP. THIS HAS BEEN HAPPENING FOR OVER A YEAR. I AM SO AFRAID SOMEONE IS GOING TO GET HIT OR PROPERTY DAMAGE WILL OCCUR. YOUR FOOT CAN BE PRESSED ON THE BRAKE AND IT STILL LUNGES FORWARDS OR BACKWARDS. THIS PROBLEM STARTED AT 38,000 AND IS GETTING INCREASINGLY WORSE. *TR
NHTSA ODI #10422700
110,000 miles · Aug 3, 2011
Power TrainVehicle Speed Control
I HAVE A 2006 FORD FIVE HUNDRED, AND IT HAS RECENTLY THE ENGINE ACCELERATES THE VEHICLE DURING LOW SPEEDS IN FORWARD AND REVERSE, WHILE APPROACHING AN INTERSECTION WITH FOOT ON BRAKE. THIS HAS HAPPENS CONTINUOUSLY. I AM NOT SURE WHAT TO DO. I HAVE READ THE OTHER COMPLAINTS AND IT SEEMS THAT FORD IS NOT INTERESTED IN SOLVING THE …
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I HAVE A 2006 FORD FIVE HUNDRED, AND IT HAS RECENTLY THE ENGINE ACCELERATES THE VEHICLE DURING LOW SPEEDS IN FORWARD AND REVERSE, WHILE APPROACHING AN INTERSECTION WITH FOOT ON BRAKE. THIS HAS HAPPENS CONTINUOUSLY. I AM NOT SURE WHAT TO DO. I HAVE READ THE OTHER COMPLAINTS AND IT SEEMS THAT FORD IS NOT INTERESTED IN SOLVING THE PROBLEM. READ MORE: HTTP://WWW.FAQS.ORG/CAR/FORD-FIVE-HUNDRED-2006/FUEL-SYSTEM/#RECALLS_0#IXZZ1U0A0PMOY *KB
NHTSA ODI #10416943
72,500 miles · Jul 30, 2011
Fuel System, OtherPower Train
MY 2006 FORD FIVE HUNDRED ACCELERATES UNCONTROLLABLY. WHEN THE CAR IS SHIFTED INTO GEAR IT ACCELERATES WITHOUT THROTTLING. IT HAPPENS FROM PARK-TO-ANY GEAR AND SOMETIMES WHEN AT TRAFFIC STOPS. I'VE NOTICED THIS PROBLEM FOR A WHILE, BUT IT IS GETTING PROGRESSIVELY WORSE. SCARY!!! *TR
NHTSA ODI #10416334
65,970 miles · Jul 29, 2011
Power Train
VEHICLE WAS IN REVERSE TO PULL OUT OF DRIVEWAY, VEHICLE LURCHED AND THEN WOULD NOT ACCELERATE. TURNED OFF KEY, RESTARTED, PULLED INTO STREET, VEHICLE AGAIN LURCHED, WRENCH LIGHT ILLUMINATED ON DASH, VEHICLE SHUT ITSELF OFF. TURNED KEY OFF AND RESTARTED--CAR DID SAMETHING AGAIN IN THE MIDDLE OF THE STREET. LAST TIME, REKEYED VE…
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VEHICLE WAS IN REVERSE TO PULL OUT OF DRIVEWAY, VEHICLE LURCHED AND THEN WOULD NOT ACCELERATE. TURNED OFF KEY, RESTARTED, PULLED INTO STREET, VEHICLE AGAIN LURCHED, WRENCH LIGHT ILLUMINATED ON DASH, VEHICLE SHUT ITSELF OFF. TURNED KEY OFF AND RESTARTED--CAR DID SAMETHING AGAIN IN THE MIDDLE OF THE STREET. LAST TIME, REKEYED VEHICLE WORKED FROM THAT POINT. CAR TAKEN TO DEALER & HAD A CODE OF U0401 IN TRANSMISSION. WAS TOLD THROTTLE BODY WAS DEFECTIVE. HAVE NOT REPLACED PART AT THE POINT DUE TO COST. *TR
NHTSA ODI #10416285
75,000 miles · Jul 20, 2011
Power TrainVehicle Speed ControlCrash
I HAVE A 06' FORD FIVE HUNDRED THAT I PURCHASED CERTIFIED USED IN 07'. WITHIN A FEW MONTHS I STARTED EXPERIENCING SURGING PROBLEMS ESPECIALLY WHEN THE A/C WAS RUNNING. THE DEALER REPLACED THE INSTRUMENT CLUSTER IN 08' BUT DID NOT FIX THE PROBLEM. ON EACH RETURN TO THE DEALERSHIP THEY COULD NOT FIX THE PROBLEM. ON MY LAST VIS…
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I HAVE A 06' FORD FIVE HUNDRED THAT I PURCHASED CERTIFIED USED IN 07'. WITHIN A FEW MONTHS I STARTED EXPERIENCING SURGING PROBLEMS ESPECIALLY WHEN THE A/C WAS RUNNING. THE DEALER REPLACED THE INSTRUMENT CLUSTER IN 08' BUT DID NOT FIX THE PROBLEM. ON EACH RETURN TO THE DEALERSHIP THEY COULD NOT FIX THE PROBLEM. ON MY LAST VISIT TO THE DEALER THEY CLEANED THE THROTTLE BODY AND SAID THAT WOULD FIX THE PROBLEM. THIS DID NOT FIX THE PROBLEM AND THEY COULD NOT DIAGNOSE THE PROBLEM. THIS PROBLEM HAS CAUSED ME TO REAREND A VEHICLE IN 2009. FORD IS NOT RESPONDING TO THE PROBLEM AT ALL. AFTER 3+ YEARS OF TRYING TO FIGURE OUT WHAT THE PROBLEM IS I ALL BUT HAVE GIVEN UP. THAT IS UNTIL TODAY WHEN THE REPAIR SHOP THAT I USE ON A REGULAR BASIS HIRED A NEW MECHANIC WHO WAS ABLE TO DIAGNOSE THE PROBLEM. THE PROBLEM TURNS OUT TO BE THE THROTTLE POSITION SENSORS IN THE THROTTLE BODY. IT TOOK THE MECHANIC OVER 2 HOURS TO GET TO THE BOTTOM OF THE PROBLEM. THE UNFORTUNATE THING IS THE COST OF A NEW THROTTLE BODY IS OVER $500 THEN ADD LABOR. IF I HAVE THE THROTTLE BODY REPLACED THERE IS NO GUARANTEE FROM FORD THAT THE NEW THROTTLE BODY WON'T DO THE SAME THING. IT IS OBVIOUS THAT FORD HAS A PROBLEM WITH THE THROTTLE BODY AND IS NOT WILLING TO RESOLVE THE ISSUE AND BACK THEIR PRODUCTS. *KB
NHTSA ODI #10413816
Mileage unknown · Jul 20, 2011
Power TrainVehicle Speed Control
2006 FORD FIVE HUNDRED SURGING AT LOW SPEED WHEN PUTTING INTO DRIVE AND REVERSE. THIS PROBLEM GAS OCCURRED ON MANY OCCASIONS WITH NEAR MISSES ON PARKING AND PEDESTRIANS AND MY RESEARCH HAS FOUND IT TO BE AN ISSUE WITH THE THROTTLE BODY CONTROL. WHEN IS THIS AGENCY GOING TO HELP THE CONSUMER IN A CASE AGAINST FORD?? ITS BEEN HAPP…
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2006 FORD FIVE HUNDRED SURGING AT LOW SPEED WHEN PUTTING INTO DRIVE AND REVERSE. THIS PROBLEM GAS OCCURRED ON MANY OCCASIONS WITH NEAR MISSES ON PARKING AND PEDESTRIANS AND MY RESEARCH HAS FOUND IT TO BE AN ISSUE WITH THE THROTTLE BODY CONTROL. WHEN IS THIS AGENCY GOING TO HELP THE CONSUMER IN A CASE AGAINST FORD?? ITS BEEN HAPPENING SINCE 2005 ON MANY OF THESES MODELS??? *KB
NHTSA ODI #10413807
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