DRIVING UP RAMP TO GET ON 95 CAR STARTED SLOWING DOWN AFTER I GAVE IT GAS TO GET UP RAMP. I NOTICED A WRENCH LIGHT ILLUMINATED ON DASH SO I PULLED OF MANUAL AFTER TURNING OFF CAR TO SEE WHAT IT MEANT (THROTTLE) I SAT FOR 5 FIVES STARTED THE CAR AND IT DROVE FINE, BUT SINCE THEN IT HAS HAPPEN 3 MORE TIMES. *TR
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 →How this year compares
Owner complaints by model year
Compare all Mariner years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
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.
What owners actually said
315 reportsWHILE I WAS DRIVING THE CAR JERKED AS IF I HIT MY BRAKES AND IT WOULDN'T LET ME ACCELERATE ANYMORE SO I PULLED OVER ON THE SIDE OF THE ROAD AND THE CAR WAS VIBRATING REAL ROUGH SO I TURNED THE CAR OFF AND SAT THERE FOR A MINUTE AND TRIED STARTING IT AND IT TOOK A COUPLE TRIES AND I GOT DOWN THE ROAD AND PULLED INTO WHERE I WAS G…
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WHILE I WAS DRIVING THE CAR JERKED AS IF I HIT MY BRAKES AND IT WOULDN'T LET ME ACCELERATE ANYMORE SO I PULLED OVER ON THE SIDE OF THE ROAD AND THE CAR WAS VIBRATING REAL ROUGH SO I TURNED THE CAR OFF AND SAT THERE FOR A MINUTE AND TRIED STARTING IT AND IT TOOK A COUPLE TRIES AND I GOT DOWN THE ROAD AND PULLED INTO WHERE I WAS GOING AND IT DID IT AGAIN AS I WAS PULLING INTO A PARKING SPOT. I REALLY HOPE THIS PROBLEM CAN GET RESOLVED SOON WITH NO COST IV DONE EVERYTHING I CAN TO MY CAR TO KEEP IT IN GOOD CONDITION AS IN GETTING THE OIL CHANGED IN IT EVERY THREE THOUSAND MILES AND EVEN PUTTING THE BEST GASOLINE IN IT AT $3.65 CENTS A GALLON SO ITS TIME FOR FORD/MERCURY TO SUPPORT THERE SIDE OF THE SITUATION. *TR
WHEN BEING AGGRESSIVE WITH THE ACCELERATOR THE ENGINE STALLS AND THE ACCELERATOR STOPS WORKING FORCING THE DRIVER TO PULL OFF OF THE ROAD. WHEN BRING THE CAR TO A STOP IT JERKS FORWARD UNTIL IT IS PUT INTO PARK, STILL THE ACCELERATOR DOES NOT WORK NO MATTER HOW PUSHED. AFTER TURNING IT OFF START UP TAKES LONGER THAN USUAL AND EI…
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WHEN BEING AGGRESSIVE WITH THE ACCELERATOR THE ENGINE STALLS AND THE ACCELERATOR STOPS WORKING FORCING THE DRIVER TO PULL OFF OF THE ROAD. WHEN BRING THE CAR TO A STOP IT JERKS FORWARD UNTIL IT IS PUT INTO PARK, STILL THE ACCELERATOR DOES NOT WORK NO MATTER HOW PUSHED. AFTER TURNING IT OFF START UP TAKES LONGER THAN USUAL AND EITHER THE LITTLE WRENCH OR THE ENGINE SYMBOL APPEARS. AFTER TAKING IT TO A MECHANIC IT IS DIAGNOSED THAT IS HAS A BAD ELECTRONIC THROTTLE AND IT WILL HAVE TO BE REPLACE. PRIOR TO THIS THERE HAS NOT HAD AN ACCIDENT, INSTANCE OR WORK DONE THAT WOULD CAUSE THIS. *TR
I WAS LEAVING WORK AND DRIVING DOWN A ROAD AT ABOUT 50MPH WHEN ALL OF A SUDDEN MY CAR JUMPED AND I THEN WAS COMING UP TO A RED LIGHT SO I WAS BRAKING AND BEHIND A CAR. AT THE RED LIGHT I WAS A FEW INCHES FROM HITTING THE CAR BECAUSE MY CAR KEPT JUMPING FORWARD. I THEN GOT SCARED AND TURNED MY CAR OFF AND BACK ON AND IT WAS DRI…
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I WAS LEAVING WORK AND DRIVING DOWN A ROAD AT ABOUT 50MPH WHEN ALL OF A SUDDEN MY CAR JUMPED AND I THEN WAS COMING UP TO A RED LIGHT SO I WAS BRAKING AND BEHIND A CAR. AT THE RED LIGHT I WAS A FEW INCHES FROM HITTING THE CAR BECAUSE MY CAR KEPT JUMPING FORWARD. I THEN GOT SCARED AND TURNED MY CAR OFF AND BACK ON AND IT WAS DRIVING FINE. THEN ALL OF A SUDDEN IT DID THE SAME THING AND I COULDN'T ACCELERATE I WOULD PRESS ON THE GAS AND MY CAR WAS JUST SHAKING AND LOSING SPEED AND WOULDN'T MOVE. THANKFULLY I DIDN'T DRIVE THE HIGHWAY HOME THAT DAY. *TR
TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING 65 MPH, THE VEHICLE LOST ACCELERATION POWER THEN STALLED. THE VEHICLE WAS MOVED TO THE SHOULDER AND RESTARTED THEN THE CHECK ENGINE LIGHT ILLUMINATED. THE CONTACT TOOK THE VEHICLE TO A DEALER, WHERE THEY RAN A DIAGNOSTIC TEST AND STATED THAT THE…
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TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING 65 MPH, THE VEHICLE LOST ACCELERATION POWER THEN STALLED. THE VEHICLE WAS MOVED TO THE SHOULDER AND RESTARTED THEN THE CHECK ENGINE LIGHT ILLUMINATED. THE CONTACT TOOK THE VEHICLE TO A DEALER, WHERE THEY RAN A DIAGNOSTIC TEST AND STATED THAT THE ACCELERATOR WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED BUT THE FAILURE RECURRED. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER BUT NO DEFECT WAS FOUND. THE FAILURE MILEAGE WAS 87,000. ...UPDATED 07-10-13 *BF
THIS IS THE FOURTH TIME SINCE PURCHASING THE CAR AT CARMAX IN OCTOBER 2012 THAT THE CAR HAS "SHUT OFF" WITHOUT WARNING AT LOW SPEED WHEN CLOSE TO PARKING OR DRIVING SLOW--WITHOUT RHYME NOR REASON--I HAD IT DIAGNOSED AT CARMAX TO NO AVAIL, THEN CHEROKEE FORD TO NO AVAIL (WHERE I PURCHASED A NEW BATTERY), THEN AT CHRISTIAN BROTHER…
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THIS IS THE FOURTH TIME SINCE PURCHASING THE CAR AT CARMAX IN OCTOBER 2012 THAT THE CAR HAS "SHUT OFF" WITHOUT WARNING AT LOW SPEED WHEN CLOSE TO PARKING OR DRIVING SLOW--WITHOUT RHYME NOR REASON--I HAD IT DIAGNOSED AT CARMAX TO NO AVAIL, THEN CHEROKEE FORD TO NO AVAIL (WHERE I PURCHASED A NEW BATTERY), THEN AT CHRISTIAN BROTHERS AUTO WHERE THEY REPLACED THE SPARK PLUGS AND COIL.( I HAVE AN EXTENDED WARRANTY SO MY COST WAS 200DOLLARS) THE PROBLEM CONTINUES. I HAVE DONE RESEARCH AND SEE THE THROTTLE BODY IS MOST LIKELY THE CULPRIT AND A SAFETY ALERT IS ON THE WEB FROM CONSUMER REPORT AND FORD FORUM AND NORTH CAROLINA SAFETY BOARD---I AM HAVING THE TROTTLE BODY REPLACED AT MY EXPENSE--MY DAUGHTER DRIVES THIS VEHICLE AND I WANT IT SAFE! APPARENTLY THIS INVOLVES THIS MODEL 2009-2012. *TR
WHILE DRIVING MY CAR SUDDENLY BEGAN DECREASING IN SPEED, IT APPEARED MY GAS PEDAL HAD BEEN DISCONNECTED. THE CAR WAS STILL ON SO I TURNED IT OFF AND BACK ON AND IT WORKED FINE. FOR A MONTH BEFORE HAND MY CAR WOULD MAKE A LOUD BANG AND JOLT WHEN EVER I SWITCHED BETWEEN DRIVE, REVERSE, PARK ETC. WHEN PRESENTING THE PROBLEM TO FO…
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WHILE DRIVING MY CAR SUDDENLY BEGAN DECREASING IN SPEED, IT APPEARED MY GAS PEDAL HAD BEEN DISCONNECTED. THE CAR WAS STILL ON SO I TURNED IT OFF AND BACK ON AND IT WORKED FINE. FOR A MONTH BEFORE HAND MY CAR WOULD MAKE A LOUD BANG AND JOLT WHEN EVER I SWITCHED BETWEEN DRIVE, REVERSE, PARK ETC. WHEN PRESENTING THE PROBLEM TO FORD THEY WERE VERY RUDE BUT EXPLAINED I HAD HEARD ABOUT THIS ISSUE ONLINE. THEY FINALLY LOOKED AT THE CAR FOR ME AND WERE GIVEN AN ERROR CODE (OF P101 I BELIEVE). *TR
TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 50 MPH, THE VEHICLE ABNORMALLY ACCELERATED. THE CONTACT APPLIED THE BRAKES AND WAS ABLE TO STOP THE INDEPENDENT ACCELERATION. THE FAILURE RECURRED THREE TIMES. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAI…
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TL* THE CONTACT OWNS A 2009 MERCURY MARINER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 50 MPH, THE VEHICLE ABNORMALLY ACCELERATED. THE CONTACT APPLIED THE BRAKES AND WAS ABLE TO STOP THE INDEPENDENT ACCELERATION. THE FAILURE RECURRED THREE TIMES. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 65,000. *TR
UPDATE TO 01/30/13 COMPLAINT. I PURCHASED CAR ON 10/22/12 WITH 58,398 MILES FROM A DEALER. I STARTED HAVING ISSUES LATE DECEMBER 2012. I WAS HAVING PROBLEM WITH CAR JERKING INTO GEAR OR BEING SLUGGISH WHEN ACCELERATING. I TOOK CAR TO DEALER ON 01/29/13. RESEARCHED CARFAX INFORMATION AND FOUND OUT THAT ON 01/05/10 - TRANSMISSION…
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UPDATE TO 01/30/13 COMPLAINT. I PURCHASED CAR ON 10/22/12 WITH 58,398 MILES FROM A DEALER. I STARTED HAVING ISSUES LATE DECEMBER 2012. I WAS HAVING PROBLEM WITH CAR JERKING INTO GEAR OR BEING SLUGGISH WHEN ACCELERATING. I TOOK CAR TO DEALER ON 01/29/13. RESEARCHED CARFAX INFORMATION AND FOUND OUT THAT ON 01/05/10 - TRANSMISSION FLUSHED AND STATED AS REPLACED. 18,588 MILES. 08/09/10 - TRANSMISSION WAS REMOVED TO REPLACE COOLER. 28,372 MILES. ON 01/29/13 MECHANIC ADVISED THAT TRANSMISSION WAS LEAKING BADLY AND THAT "PRESS REGULATOR VALVE STICKING". 01/30/13 - TRANSMISSION VALVE BODY REPLACED. 63,356 MILES. 6 WEEKS AFTER VALVE BODY REPLACED CAR STARTED JERKING AGAIN. TOOK CAR TO DEALER ON 03/18/13...DEALER SUGGESTED REPLACEMENT OF TRANSMISSION, BUT EXTENDED WARRANTY COMPANY SAID NO...WOULD ONLY PAY FOR TRANSMISSION REBUILD. 65,951 MILES. THIS ENTAILED DAY AND HALF OF DEALER/WARRANTY COMPANY HAGGLING OVER REPAIRS. MECHANIC BEGAN WORK ON 03/21/13 AND FOUND LOTS OF MELTED PLASTIC THAT HE HAD TO REMOVE. TRANSMISSION WORK COMPLETED ON 03/23/13 BUT REPAIR REVEALED STARTER PROBLEM. DEALER CURRENTLY WAITING ON APPROVAL FROM WARRANTY COMPANY TO REPAIR STARTER. MECHANIC ADVISED IF STARTER NOT REPAIRED WILL CAUSE FLY WHEEL PROBLEM. MECHANIC IS ANNOYED THAT TRANSMISSION IS HAVING PROBLEMS SO SOON AFTER 2010 "REPAIRS" AND THAT WARRANTY COMPANY REFUSED TO REPLACE TRANSMISSION. *TR
WHILE ENTERING INTERSTATE HIGHWAY, ENGINE BALKED LIKE BAD GAS. AFTER TWO OR THREE TANKFULS AND THE VEHICLE DYING IN TRAFFIC, I LEFT IT WITH MY DEALER TO FIND THE PROBLEM. AFTER A WEEK, THE VEHICLE HAD NOT DIED FOR THEM SO I BROUGHT IT HOME, ONLY TO CONTINUE WITH THE SAME DYING AND HESITATING WHEN ACCELERATED. A MONTH OR SO LA…
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WHILE ENTERING INTERSTATE HIGHWAY, ENGINE BALKED LIKE BAD GAS. AFTER TWO OR THREE TANKFULS AND THE VEHICLE DYING IN TRAFFIC, I LEFT IT WITH MY DEALER TO FIND THE PROBLEM. AFTER A WEEK, THE VEHICLE HAD NOT DIED FOR THEM SO I BROUGHT IT HOME, ONLY TO CONTINUE WITH THE SAME DYING AND HESITATING WHEN ACCELERATED. A MONTH OR SO LATER THE DEALER KEPT IT AGAIN FOR ABOUT 5 DAYS AND IT STILL DID OKAY FOR THEM. THEY HAVE NO IDEA WHAT THE "PROBLEM" IS. WE HAVE PARKED THE CAR IN OUR GARAGE BECAUSE SEVERAL TIMES WE HAVE NARROWLY ESCAPED BEING REAR-ENDED, WHEN TURNING CORNERS, CROSSING RAILROAD TRACKS, ETC. I CONTACTED FORD MOTOR CO. IN MICHIGAN AND THEY DO NOT "HAVE THIS PROBLEM WITH OTHER VEHICLES" AND DON'T SEEM TO KNOW WHAT I'M TALKING ABOUT. MECHANICS IN TWO OTHER GARAGES HAVE DRIVEN THE VEHICLE AND HAVE NOT LOCATED THE PROBLEM. HELP!! *TR
Official recalls
114V284000 · 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
2DP15001 · 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
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