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2009 Mercury Mariner

Owner reports · Recalls · Investigations

More warning signs than most Mariner years

Owner complaints for the 2009 Mercury Mariner are substantially higher than the model-year median of 63.

About this comparison →

When problems were reported

Mileage at the reported incident

251 reports with mileage · 64 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Steering. Review the 167 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

9 crash reports0 fire reports3 injury reports

What owners actually said

315 reports
59,500 miles · Aug 27, 2013
EngineFuel/propulsion SystemPower Train

THIS ACTUALLY FIRST OCCURRED ON FRIDAY. I WAS TRAVELING ON THE THRUWAY AT ABOUT 65MPH WHEN THE CAR FELT ALMOST LIKE IT DOWNSHIFTED AND THEN I TOTALLY LOST ACCELERATION AND THE WRENCH LIGHT APPEARED ON THE DASH. I LIMPED TO THE SIDE OF THE ROAD AND THE CAR JERKED AND SPUTTERED BEFORE I SHUT IT OFF. AFTER A FEW MINUTES I RESTARTED…

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THIS ACTUALLY FIRST OCCURRED ON FRIDAY. I WAS TRAVELING ON THE THRUWAY AT ABOUT 65MPH WHEN THE CAR FELT ALMOST LIKE IT DOWNSHIFTED AND THEN I TOTALLY LOST ACCELERATION AND THE WRENCH LIGHT APPEARED ON THE DASH. I LIMPED TO THE SIDE OF THE ROAD AND THE CAR JERKED AND SPUTTERED BEFORE I SHUT IT OFF. AFTER A FEW MINUTES I RESTARTED THE VEHICLE AND IT SOUNDED LIKE IT WAS FLOODED AT FIRST THEN IT TURNED OVER NORMALLY. I WAS AN HOUR FROM HOME AND MADE IT BACK WITHOUT FURTHER INCIDENT. I TOOK IT TO THE DEALER THE NEXT MORNING AND IT DID NOT SHOW ANY CODES. THEY SUGGESTED I REPLACE THE PURGE VALVE, AND AS I HAD A BUSY WEEK OF WORK RELATED TRAVEL SCHEDULED I WENT AHEAD AND HAD THEM DO IT FOR $120. BETTER SAFE THAN SORRY. RIGHT? TODAY I GET AN HOUR FROM HOME AND IT HAPPENS AGAIN. I CALL MY DEALER AND THEY SUGGEST I FIND THE CLOSEST FORD DEALER AND TAKE IT THERE IMMEDIATELY. CLOSEST FORD DEALER COULDN'T TAKE ME FOR 2 WEEKS!! I WAS AN HOUR FROM MY DESTINATION, SO I DECIDED TO CHANCE IT. I DROVE ABOUT 20 MINUTES AND IT HAPPENED AGAIN. SAME EXACT SCENARIO. I STARTED IT AGAIN, GOT BACK ON THE ROAD AND DROVE 10 MINUTES AND AGAIN, EXCEPT THIS TIME THE ENGINE LIGHT ALSO CAME ON. I CALLED ROADSIDE ASSISTANCE AND WAS TOWED TO A GARAGE. I AM 2 1/2 HOURS FROM HOME AND DRIVING A RENTAL. GARAGE WILL DIAGNOSE AND HOPEFULLY FIX TOMORROW. SERVICE TECH SAID IF HE HAD TO DIAGNOSE WITHOUT A CODE HE WOULD SAY THROTTLE BODY! IT ALSO SOUNDS LIKE THIS IS NOT COVERED BY MY 5 YEAR/60K WARRANTY EITHER. WITH ALL OF THE SIMILAR STORIES I HAVE READ ONLINE FORD NEEDS TO BE FORCED TO DO A RECALL AND REIMBURSE US ALL FOR OUR EXPENSES. *TR

NHTSA ODI #10537608

39,230 miles · Aug 27, 2013
EnginePower Train

THE FIRST SIGN OF A PROBLEM WITH MY 2009 MERCURY MARINER (39,000 MILES) WAS THREE DAYS AGO WHEN IT STALLED AT A STOP LIGHT. TODAY WAS A BIT MORE DRAMATIC. AT 70 MPH IN HEAVY TRAFFIC THE VEHICLE RPM SUDDENLY DROPPED DOWN TO 900 AND THE ACCELERATOR WAS NONE RESPONSIVE. FORTUNATELY, I WAS ABLE TO COAST ACROSS SEVERAL LANES ONTO TH…

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THE FIRST SIGN OF A PROBLEM WITH MY 2009 MERCURY MARINER (39,000 MILES) WAS THREE DAYS AGO WHEN IT STALLED AT A STOP LIGHT. TODAY WAS A BIT MORE DRAMATIC. AT 70 MPH IN HEAVY TRAFFIC THE VEHICLE RPM SUDDENLY DROPPED DOWN TO 900 AND THE ACCELERATOR WAS NONE RESPONSIVE. FORTUNATELY, I WAS ABLE TO COAST ACROSS SEVERAL LANES ONTO THE SHOULDER OF THE ROAD. AS I SLOWED TO A STOP THE VEHICLE BEGAN SURGING AND BUCKING. I NOTICED THE WRENCH LIGHT WAS ON. THEN I TURNED OFF THE VEHICLE. IT RESTARTED FINE A FEW MINUTES LATER AND RAN NORMALLY (NO WARNING LIGHTS) OVER TO THE FORD DEALERSHIP. AFTER LISTENING TO MY STORY, THE FORD SERVICE MAN TOLD ME THAT HE WAS NEARLY CERTAIN THE THROTTLE BODY NEEDED REPLACEMENT. HE WENT ON TO SAY THAT HE WAS QUITE FAMILIAR WITH THE ISSUE SINCE FOR YEARS HE'S BEEN DEALING WITH - ON AVERAGE - THREE OF THESE CASES PER WEEK. THAT'S ONE SERVICE MAN AT ONE DEALERSHIP. DO THE MATH! I ASKED IF THERE WAS A RECALL OR IF FORD WOULD GIVE ME A BREAK ON THE REPAIR. HE SAID "NO", BUT AGREED THAT THE THROTTLE BODY SHOULD NOT FAIL AFTER ONLY 39,000 MILES. HE ALSO SAID IT WOULD BE A WASTE OF TIME FILING A COMPLAINT TO FORD CUSTOMER SERVICE. SO, I TOOK THE VEHICLE TO MY LOCAL MECHANIC TO HAVE IT CHECKED OUT. THEY FOUND NO ERROR CODES REGISTERED AND FOR THEIR TEST DRIVE IT RAN FINE. I DON'T KNOW WHAT TO DO NEXT. BY THE WAY, THERE WAS AN EARLIER RECALL FOR OUR VEHICLE. IN SEPTEMBER 2010, THEY REPROGRAMMED THE POWERTRAIN CONTROL MODULE AND REPLACED THE PLM, WHATEVER THAT MEANS. *TR

NHTSA ODI #10537604

90,000 miles · Aug 27, 2013
EngineFuel System, GasolinePower Train

2009 MERCURY MARINER WITH ABOUT 90,000 MILES. WAS ON THE FREEWAY DRIVING ABOUT 65-70 MPH WHEN SUDDENLY THE POWER TO CAR CUT OFF - WAS NOT ABLE TO ACCELERATE VEHICLE; DROVE TO RIGHT SIDE OF THE ROAD. CAR WAS STILL ON, BUT GAS PEDAL WOULD NOT WORK, WRENCH LIGHT WAS ON, CAR IDLING VERY ROUGHLY. TURNED CAR OFF. TURNED CAR BACK ON, W…

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2009 MERCURY MARINER WITH ABOUT 90,000 MILES. WAS ON THE FREEWAY DRIVING ABOUT 65-70 MPH WHEN SUDDENLY THE POWER TO CAR CUT OFF - WAS NOT ABLE TO ACCELERATE VEHICLE; DROVE TO RIGHT SIDE OF THE ROAD. CAR WAS STILL ON, BUT GAS PEDAL WOULD NOT WORK, WRENCH LIGHT WAS ON, CAR IDLING VERY ROUGHLY. TURNED CAR OFF. TURNED CAR BACK ON, WRENCH LIGHT WAS OFF, DROVE ANOTHER 30 MINUTES TO DESTINATION WITHOUT INCIDENT. IN THE TWO HOUR DRIVE HOME, THE CAR CUT OFF FIVE MORE TIMES. I HEARD A BELL ALERT AUDIO SOUND A FEW TIMES, BUT THE ONLY LIGHT THAT CAME ON WAS THE WRENCH JUST AS THE POWER CUT OFF. THE VERY LAST TIME IT HAPPENED, THE ENGINE LIGHT CAME ON, AND STAYED ON EVEN AFTER RESTARTING THE CAR. I FEEL VERY THANKFUL TO HAVE GOT HOME ALIVE AND WITHOUT GETTING INTO AN ACCIDENT. DEALER RECOMMENDS A 90M SERVICE PACKAGE ($547), A DIAGNOSTIC TEST ($104), AND POSSIBLY A THROTTLE BODY AND/OR SENSOR ($300-ISH). *TR

NHTSA ODI #10537454

92,912 miles · Aug 24, 2013
EngineVehicle Speed Control

I WAS ON A HIGH TRAFFIC FREEWAY COMING HOME FROM A MATERNITY APPOINTMENT (I WAS 7MONTHS PREGNANT AND IT WAS HOT) AND GOING 70MPH MIDDLE LANE. WHEN MY CAR JUST CUT OFF. I WAS STILL MOVING BUT MY DASH WAS OFF CHECK ENGINE LIGHT CAME ON AND I PULLED TO THE SIDE. I COULD GET IT STARTED BACK UP BUT IT WENT OFF AGAIN. I FINALLY GOT OF…

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I WAS ON A HIGH TRAFFIC FREEWAY COMING HOME FROM A MATERNITY APPOINTMENT (I WAS 7MONTHS PREGNANT AND IT WAS HOT) AND GOING 70MPH MIDDLE LANE. WHEN MY CAR JUST CUT OFF. I WAS STILL MOVING BUT MY DASH WAS OFF CHECK ENGINE LIGHT CAME ON AND I PULLED TO THE SIDE. I COULD GET IT STARTED BACK UP BUT IT WENT OFF AGAIN. I FINALLY GOT OFF ON A RAMP. I HAD TO HAVE MY CAR TOWED AND RENT A CAR. BETWEEN THE TOW RENTAL AND WORK ON MY CAR THE TOTAL WAS (EST 1400). THEN A YEAR LATER IT BEGAN EVERY NOW AND THEN STALLING OR SURGING WHILE I WAS DRIVING. IT HAS PROGRESSIVELY WORSEN. NOW IT HAS BEEN WHEN I STOP OR LET OFF THE GAS IT GOES DEAD. RECENTLY WENT TO AN AUTO SHOP AND THEY HOOKED IT TO THE COMPUTER. IT SAID IT WAS MY THROTTLE BODY. IT WAS CLEANED AND ALL WAS FINE FOR A WEEK. AND NOW IT IS DOING IT AGAIN. I FINALLY DID GOOGLE THROTTLE BODY AND MERCURY MARINER.I FOUND OTHER COMPLAINTS. *TR

NHTSA ODI #10537040

65,000 miles · Aug 23, 2013
Fuel System, GasolineVehicle Speed Control

RECENTLY PURCHASED 2009 MERCURY MARINER (FORD ESCAPE) HAS THREE TIMES SIMPLY QUIT WHILE DRIVING AT LOW SPEED AND THE THROTTLE IS GENTLY PRESSED. LATEST INCIDENT WAS WHILE TRAVELING UPHILL WITH TWO GRANDCHILDREN AND A 18 WHEEL TRUCK ON THE BACK BUMPER. LUCKILY MY WIFE HAD THE PRESENCE OF MIND TO SHIFT TO NEUTRAL, RE-START THE E…

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RECENTLY PURCHASED 2009 MERCURY MARINER (FORD ESCAPE) HAS THREE TIMES SIMPLY QUIT WHILE DRIVING AT LOW SPEED AND THE THROTTLE IS GENTLY PRESSED. LATEST INCIDENT WAS WHILE TRAVELING UPHILL WITH TWO GRANDCHILDREN AND A 18 WHEEL TRUCK ON THE BACK BUMPER. LUCKILY MY WIFE HAD THE PRESENCE OF MIND TO SHIFT TO NEUTRAL, RE-START THE ENGINE, AND ACCELERATE AWAY FROM THE TRUCK. NO ERROR CODES HAVE BEEN SET DURING THESE THREE EVENTS. *TR

NHTSA ODI #10536868

45,300 miles · Aug 8, 2013
Fuel System, GasolinePower TrainVehicle Speed Control

DRIVING ALONG AND UNEXPECTEDLY ENGINE GOES IN LIMP MODE WITH NO WARNING AND NO ACCELERATION- EXTREMELY DANGEROUS AS WAS DRIVING ON EXPRESSWAY WHEN THIS OCCURRED. *TR

NHTSA ODI #10534359

75,000 miles · Aug 6, 2013
Engine

TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING VARIOUS SPEEDS, THE VEHICLE STALLED ON SEVERAL OCCASIONS WITH THE ILLUMINATION OF THE CHECK ENGINE LIGHT. THE VEHICLE WAS NOT REPAIRED AND THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 75,000.

NHTSA ODI #10533934

54,000 miles · Jul 31, 2013
Fuel System, GasolineVehicle Speed Control

DRIVING AT HIGHWAY SPEEDS WHEN THE VEHICLE LOST ALL POWER. WAS ABLE TO THE VEHICLES MOMENTUM TO PULL TO THE SIDE OF THE HIGHWAY. AFTER TURNING THE CAR OFF, WAITING, RESTARTING THE VEHICLE, I WAS ABLE TO RESTORE POWER TO THE ENGINE TO RETURN HOME. TURNING LEFT THROUGH CROSS TRAFFIC, THE VEHICLE LOST POWER AGAIN. WAS ABLE TO QUICK…

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DRIVING AT HIGHWAY SPEEDS WHEN THE VEHICLE LOST ALL POWER. WAS ABLE TO THE VEHICLES MOMENTUM TO PULL TO THE SIDE OF THE HIGHWAY. AFTER TURNING THE CAR OFF, WAITING, RESTARTING THE VEHICLE, I WAS ABLE TO RESTORE POWER TO THE ENGINE TO RETURN HOME. TURNING LEFT THROUGH CROSS TRAFFIC, THE VEHICLE LOST POWER AGAIN. WAS ABLE TO QUICKLY TURN THE VEHICLE OFF THEN ON AGAIN TO RESTORE POWER AND MOVE OUT OF THE WAY OF ONCOMING TRAFFIC. THE DEALER DIAGNOSED AND REPLACED THE THROTTLE BODY FOR BEING DEFECTIVE. THE VEHICLE IS NO LONGER UNDER WARRANTY AND I WAS REQUIRED TO PAY. THIS IS THE SECOND TIME THIS PROBLEM HAS HAPPENED. 1.5 YEARS AGO THE SAME PROBLEM HAPPENED AND THE THROTTLE BODY WAS REPLACED UNDER WARRANTY. *TR

NHTSA ODI #10532803

50,000 miles · Jul 30, 2013
EngineVehicle Speed Control

ABOUT FOUR WEEKS AGO I HAD NOTICED THAT THE GAS PEDAL OF MY CAR WAS ACTING STRANGELY; OCCASIONALLY, AS I WAS TRYING TO ACCELERATE FROM A STOPPED POSITION IT WOULDN'T WORK, OR "CATCH," RIGHT AWAY, AND I WOULD HAVE TO PUSH DOWN INCREASINGLY HARD UNTIL IT MOVED. I HAD AN APPOINTMENT AT MY LOCAL DEALERSHIP WHEN I WAS DRIVING HOME ON…

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ABOUT FOUR WEEKS AGO I HAD NOTICED THAT THE GAS PEDAL OF MY CAR WAS ACTING STRANGELY; OCCASIONALLY, AS I WAS TRYING TO ACCELERATE FROM A STOPPED POSITION IT WOULDN'T WORK, OR "CATCH," RIGHT AWAY, AND I WOULD HAVE TO PUSH DOWN INCREASINGLY HARD UNTIL IT MOVED. I HAD AN APPOINTMENT AT MY LOCAL DEALERSHIP WHEN I WAS DRIVING HOME ONE FRIDAY, STOPPED AT A STOP LIGHT TO TURN LEFT, AND IT STALLED. I BROUGHT IT IN THE FOLLOWING MONDAY MORNING AND AFTER A COUPLE HOURS THE SERVICE ADVISOR AND TECHNICIAN TOLD ME I NEEDED A NEW THROTTLE BODY. THEY TESTED IT AND SAID THEY COULD SEE IT "STICKING." HOWEVER, AND THIS IS WHERE MY COMPLAINT COMES IN, THEY TOLD ME A NEW PART WOULDN'T COME IN RIGHT AWAY AS IT WAS ON BACKORDER AND THERE WERE 48,000 ORDERS BESIDES MINE! IT HAS SINCE BEEN 3 WEEKS SINCE THAT VISIT WITH NO NEW PART AND NO EXPECTED DATE, AND THE SERVICE ADVISOR TOLD ME TODAY WHEN I CALLED THAT THERE WERE CLOSE TO 750,000 ORDERS FOR THIS THROTTLE BODY BECAUSE IT'S THE SAME PART USED IN MANY DIFFERENT VEHICLE MAKE AND MODELS. REGARDLESS, MY CAR IS PROGRESSIVELY GETTING WORSE. WHEN I PUSH THE GAS PEDAL I MORE FREQUENTLY GET NO ACTION AND AT TIMES IT NOW ALSO ACCELERATES UNNATURALLY FAST, ALMOST JUMPS, THEN QUICKLY RETURNS TO NORMAL. YESTERDAY THE PEDAL REQUIRED SO MUCH FORCE BEFORE THE CAR MOVED THAT I THOUGHT IT HAD STALLED ON ME AGAIN, ONLY THIS TIME WHILE I WAS DRIVING IT. THE DEALERSHIP HAS TOLD ME THAT THEY HAVE NO IDEA WHEN THE PART COULD COME IN AND CANNOT GIVE ME A LOANER CAR FOR AN UNLIMITED AMOUNT OF TIME, SO UNTIL THEN I AM DRIVING AROUND IN UNRELIABLE VEHICLE, NEVER QUITE SURE HOW IT'S GOING TO ACT. IT INFURIATES ME THAT THERE ARE SO MANY OF THESE PARTS ON BACK ORDER, AND YET A RECALL WAS NEVER ISSUED. HAD THERE BEEN A RECALL WHEN THE OTHER THOUSANDS OF PEOPLE HAD ISSUES I WOULD NOT HAVE TO SIT AROUND WAITING, WHILE FEELING LIKE I'M PUTTING MY OWN LIFE IN DANGER. *TR

NHTSA ODI #10532734

92,000 miles · Jul 29, 2013
Fuel System, Gasoline

ON JUNE 11TH, 2013, I WAS TURNING A CORNER AND MY VEHICLE WAS NOT ALLOW ME TO ACCELERATE. I WAS ABLE TO PULL OVER TO THE SIDE OF THE ROAD AND TURN THE VEHICLE OFF. I SAT WITH THE VEHICLE OFF FOR ABOUT FIVE MINUTES AND WAS ABLE TO START IT BACK UP. I THEN DROVE A FEW FEET, AND IT STALLED AGAIN. I THEN TURNED IT BACK OFF AND LET I…

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ON JUNE 11TH, 2013, I WAS TURNING A CORNER AND MY VEHICLE WAS NOT ALLOW ME TO ACCELERATE. I WAS ABLE TO PULL OVER TO THE SIDE OF THE ROAD AND TURN THE VEHICLE OFF. I SAT WITH THE VEHICLE OFF FOR ABOUT FIVE MINUTES AND WAS ABLE TO START IT BACK UP. I THEN DROVE A FEW FEET, AND IT STALLED AGAIN. I THEN TURNED IT BACK OFF AND LET IT SIT FOR A FEW MORE MINUTES, IN WHICH I WAS ABLE TO RESTART IT AND DRIVE HOME. HE SAME PROBLEM HAS OCCURRED AT LEAST 5-10 MORE TIMES SINCE THEN. SINCE THEN I HAVE HAD THE THROTTLE BODY CLEANED, PUT THE ISSUE STILL EXIST. THE MOST RECENT OCCURRENCE WAS THIS MORNING AT 10: 30 AM. I CONTACTED AFTER-MARKET AUTO PART STORES AND THEY DO NOT CARRY A THROTTLE POSITION SENSOR. I CONTACTED THE LOCAL FORD DEALERSHIP AND THEY TOLD ME THAT THE PART WAS ON BACK ORDER AND IT WOULD TAKE SOME TIME TO GET THE PART IN. *TR

NHTSA ODI #10532368

Official recalls

1

14V284000 · Steering:electric Power Assist System

May 29, 2014

Ford Motor Company (Ford) is recalling certain model year 2008-2011 Ford Escape and Mercury Mariner vehicles manufactured August 18, 2006, through September 11, 2010. The affected vehicles have a steering torque sensor that may not be able to properly detect driver steering input. As a result, the system could remove the Electric Power Steering (EPS) assist.

Consequence & remedy

Consequence: If power steering assist is lost, greater driver effort would be required to steer the vehicle at low speeds, increasing the risk of a crash.

Remedy: Ford will notify owners, and dealers will update the software for the power steering control module (PSCM) and the instrument cluster module, free of charge. If a vehicle shows a history of a loss of the torque sensor signal or fault codes relating to the PSCM when the vehicle is brought in for the recall remedy, the affected components will be replaced, free of charge. The recall began on July 18, 2014. Owners may contact Ford customer service at 1-800-392-3673. Ford's number for this recall is 14S05.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

2

DP15001 · Loss Of Power Steering While Driving

Opened Apr 1, 2015 · Closed Jun 14, 2018

Status: closed (inferred from source dates) · Steering:electric Power Assist System

On May 27, 2014, amended June 2, 2014, Ford Motor Company (Ford) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect that may result in a sudden loss of power steering assist while driving in approximately 746,067 model year (MY) 2008 through 2011 Ford Escape vehicles equipped with electric power assisted steering (NHTSA 14V-284, Ford 14S05). Ford's DIR described the defect condition as a poor signal to noise ratio [SNR] in the torque sensor within the Electric Power Assisted Steering (EPAS) system [which] does not allow the PSCM to determine the driver's steering input. When the system detects this fault condition, it transitions the EPAS system to the fail-safe/manual steering mode.Ford's DIR indicates that loss of power steering assist while driving would require higher steering effort at lower vehicle speeds, which may result in an increased risk of a crash.Ford's remedy instructs dealers to check the Power Steering Control Module (PSCM) for Diagnostic Trouble Codes (DTCs) to determine the proper repair procedure. If no DTCs are present, dealers are to update the PSCM and instrument cluster module software. The updated PSCM software changes the torque sensor fault strategy so that the SNR condition does not result in a loss of power steering assist while driving.In addition, audible and visual warnings are provided for torque sensor faults.If DTCs indicating faults in the torque sensor, PSCM or Power Steering Motor (motor) are present in the initial recall inspection, the dealer performs the following repairs: 1) replaces the torque sensor for torque sensor faults (DTC B2278); or 2) replaces the steering column for faults related to the PSCM (DTC B1342) or motor (DTC B2277).Continued in attachment pages

PE13003 · Electronic Throttle Body Malfunction

Opened Feb 21, 2013 · Closed Feb 28, 2014

Status: closed (inferred from source dates) · Engine

On February 21, 2013, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE13-003 to investigate allegations of electronic throttle body (ETB) failures resulting in sudden reduction of engine power in model year (MY) 2009-2013 Ford Escape, Fusion, Mariner and Milan vehicles. During this investigation, Ford identified a condition in subject vehicles equipped with 2.5L and 3.0L engines that may result in a sudden reduction of engine power.According to Ford, the ETB internal motor contacts may develop a high resistance material buildup condition on the commutator, resulting in intermittent electrical connectivity and reduced engine power. When this condition occurs, the Malfunction Indicator Lamp (MIL) or Wrench light will illuminate and the vehicle may enter a limited limp home mode.Ford?s trade name for the feature is Failure Mode Effects Management (FMEM) mode.In this mode, engine power and vehicle speed are reduced, while full function of the power steering, power braking, lighting, and climate control systems are maintained.ODI?s complaint analysis indicate that the predominant failure mode involved reduced motive power associated with the limited limp home mode with engine speeds limited to approximately 900 RPM. Analysis of warranty claims provided by Ford identified 59,807 claims related to ETB replacements and approximately 50 percent of claims are associated with diagnostic trouble codes (DTC) P2111, Throttle Body Stuck Open, and P2112, Throttle Body Stuck Closed.Ford described several factors where the ETB motor may fail resulting in DTCs P2111 or P2112 but the failure is not an existing stuck open or closed ETB valve position.According to Ford, the ETB control strategy provides the driver with three FMEM modes that allow varying degrees of vehicle mobility depending on the severity of the fault detected.DTCs associated with stuck open or closed throttle valves are designated the highest failure severity resulting in engine speeds limited to high idle corresponding to the limited limp home mode.Vehicles are not likely to unexpectedly stall as a result of this condition, but drivers may characterize the reduced functionality as a stall, even though their vehicle may still has motive capability.Other FMEM limp modes may result in reduced engine performance but will maintain vehicle speed above 20mph. During this investigation, Ford and its suppliers, Delphi and Igarashi, updated the powertrain control module (PCM) software to include a throttle body motor cleaning cycle during key-on and modified the ETB internal motor components design, surface finish and material composition to improve durability. Additionally, Ford developed a remedy procedure and issued a special Customer Satisfaction Program (CSP) 13N03 extending the ETB warranty coverage and instructing dealers to update the powertrain calibration to improve vehicle performance in the event that intermittent electrical connectivity of the throttle body motor contacts occurs. 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 January 31, 2015 regardless of mileage.Owners of the affected vehicles will be contacted by mail to take their vehicle to a Ford dealer who will reprogram the PCM to the latest calibration. The bulletin was sent to dealers on January 17, 2014 and the owner letter mailing began on January 27, 2014. See the investigative file for copies of Ford's bulletin and owner letter. This preliminary evaluation is closed. The closing of this investigation does not constitute a finding that