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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.

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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

Power Train complaints

44 reports
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Mileage unknown · Feb 9, 2023
Power TrainSteering

I have been intermittently losing power steering. The code is B1342. After researching, it looks like Ford is aware of this problem but is unwilling to fix the issue. This fix must be done at a dealership since it is a software issue and going to cost $2,000. Obviously losing power steering when going at fast speeds is incredibl…

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I have been intermittently losing power steering. The code is B1342. After researching, it looks like Ford is aware of this problem but is unwilling to fix the issue. This fix must be done at a dealership since it is a software issue and going to cost $2,000. Obviously losing power steering when going at fast speeds is incredibly dangerous for myself and others. There is no check engine light that comes on when the issue arises.

NHTSA ODI #11506411

105,000 miles · Jan 20, 2018
Power Train

I WAS DRIVING AROUND 40 MPH AND A LIGHT IN MY DASH THE SYMBOL OF A WRENCH APPEARED ,THEN MY SUV I LOST POWER GOING FORWARD , IT SEEMED THE ENGINE SHUT DOWN , I WAS ABLE TO GET OFF THE ROAD IN VERY BAD TRAFFIC WITH OUT GETTING INTO AN ACCIDENT . THE TRAFFIC WAS VERY HEAVY AND THE SUV WAS VERY HARD TO CONTROL WITH OUT POWER.

NHTSA ODI #11063886

94,700 miles · Dec 9, 2017
Power Train

DRIVING MY 2009 MARINER PREMIER ABOUT 35/45 MPH WHEN WRENCH SYMBOL COMES ON INDICATING THROTTLE CONTROL POWERTRAIN / TRANSMISSION PROBLEM CAR IS NOT ACCELERATING PROPERLY AND TRANSMISSION IS JERKING WHEN I STEP ON THE GAS PEDAL AND THE CAR SHAKES VIBRATES AND FEELS UNDER POWERED. GOT HOME AND PARKED IT. STARTED IT UP AND NOW C…

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DRIVING MY 2009 MARINER PREMIER ABOUT 35/45 MPH WHEN WRENCH SYMBOL COMES ON INDICATING THROTTLE CONTROL POWERTRAIN / TRANSMISSION PROBLEM CAR IS NOT ACCELERATING PROPERLY AND TRANSMISSION IS JERKING WHEN I STEP ON THE GAS PEDAL AND THE CAR SHAKES VIBRATES AND FEELS UNDER POWERED. GOT HOME AND PARKED IT. STARTED IT UP AND NOW CHECK ENGINE LIGHT IS ALSO ON. IS THIS COVERED BY THE RECALL FOR EXTENDED WARRANTY FROM FORD ?

NHTSA ODI #11053592

122,680 miles · Sep 18, 2017
Power TrainVehicle Speed Control

I AM GETTING CONTINUAL THROTTLE BODY ERRORS ON MY 2009 MARINER. IT GOES INTO LOW POWER MODE SO I CAN "LIMP HOME". IT HAPPENS MOSTLY ON HIGHWAYS WHEN I NEED TO "PUNCH IT" AND GET ALOT OF ACCELERATION.

NHTSA ODI #11024080

Mileage unknown · Apr 26, 2016
EnginePower Train

TEST DRIVING VEHICLE AND I COULD NOT ACCELERATE. DEALER SAID HE WOULD FIX PROBLEM.

NHTSA ODI #10861588

73,000 miles · Jan 6, 2016
EngineFuel/propulsion SystemPower Train

ON 1/1/2016 I WAS DRIVING ON 495 W IN QUEENS, NY HEADING BACK TO MANHATTAN WHERE I LIVE. OUT OF NOWHERE THE CAR BEGAN JERKING, A WRENCH LIGHT ON THE DASH PANEL CAME ON (WHICH I NEVER SAW BEFORE) AND I COULD TELL THE CAR WAS DECELERATING. I TRIED HITTING THE ACCELERATOR AGAIN, THE CAR WOULD JERK, THE ENGINE WAS REVVING BUT WA…

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ON 1/1/2016 I WAS DRIVING ON 495 W IN QUEENS, NY HEADING BACK TO MANHATTAN WHERE I LIVE. OUT OF NOWHERE THE CAR BEGAN JERKING, A WRENCH LIGHT ON THE DASH PANEL CAME ON (WHICH I NEVER SAW BEFORE) AND I COULD TELL THE CAR WAS DECELERATING. I TRIED HITTING THE ACCELERATOR AGAIN, THE CAR WOULD JERK, THE ENGINE WAS REVVING BUT WAS BARELY MOVING. I KNEW I HAD TO PULL OVER AND LUCKILY I WAS ABLE TO NAVIGATE TO THE SHOULDER OF THE ROAD. THIS WAS AN EXTREMELY DANGEROUS SITUATION. I AM A CONFIDENT DRIVER, HOWEVER, A LESS CONFIDENT OR TIMID DRIVER MOST LIKELY WOULD HAVE PANICKED AND GOTTEN INTO A POTENTIALLY SERIOUS COLLISION.

NHTSA ODI #10818297

100,000 miles · Dec 3, 2015
EnginePower Train

WHILE DRIVING DOWN THE ROAD ANYWHERE FROM 20-55 MPH, THE CAR SEEMS TO STALL OUT AND THE ACCELERATOR NO LONGER WORKS. YOU HAVE TO PULL OVER AND SHUT THE VEHICLE OFF AND IT WILL START AGAIN. SOMETIMES THE SAME PROBLEM WILL OCCUR AGAIN WITHIN SECONDS, MINUTES, OR DAYS LATER.

NHTSA ODI #10808197

67,000 miles · Jul 1, 2015
Power Train

NORMAL DRIVING WHEN SUDDENLY THERE WAS NO ACCELERATION & THE WRENCH LIGHT CAME ON IN THE DASHBOARD. CAR WAS RUNNING BUT THERE WAS NO ACCELERATION & IDLED ROUGHLY. MECHANIC PUT A DIAGNOSTIC ON IT WHICH READ P2112 THROTTLE CONTROL ACTUATOR SYSTEM STUCK CLOSED. BINDING THROTTLE BODY STUCK CLOSED. THERE WAS NO WARNING AND THE INCIDE…

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NORMAL DRIVING WHEN SUDDENLY THERE WAS NO ACCELERATION & THE WRENCH LIGHT CAME ON IN THE DASHBOARD. CAR WAS RUNNING BUT THERE WAS NO ACCELERATION & IDLED ROUGHLY. MECHANIC PUT A DIAGNOSTIC ON IT WHICH READ P2112 THROTTLE CONTROL ACTUATOR SYSTEM STUCK CLOSED. BINDING THROTTLE BODY STUCK CLOSED. THERE WAS NO WARNING AND THE INCIDENT WAS VERY SCARY SINCE I COULD NOT GET OUT OF THE WAY OF TRAFFIC. THE CAR WOULD GO ABOUT 1MPH UNTIL I WAS ABLE TO PULL OFF THE ROAD. WHEN THE CAR WAS LATER SHUT OFF AND RESTARTED, ACCELERATION RETURNED. THIS IS FRIGHTENING AS YOU DO NOT KNOW WHEN IT COULD HAPPEN AND COULD CAUSE A SERIOUS ACCIDENT.

NHTSA ODI #10731405

84,000 miles · Apr 14, 2015
Power Train

TRANSMISSION FLUID LEAKING FROM LEFT HAND HALFSHAFT SEAL ON MY AUTOMATIC TRANSMISSION. TOOK INTO SHOP TO HAVE IT DIAGNOSED, FOUND OUT SOMETHING IS WRONG WITH THE BEARINGS DO TO LOW FLUID. THEN I FIND OUT THERE IS A SERVICE KIT AVAILABLE FOR THIS SEAL ISSUE, HOWEVER WE HAVE NOT RECEIVED ANY NOTICE OF SUCH SERVICE KIT BEING AVAILA…

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TRANSMISSION FLUID LEAKING FROM LEFT HAND HALFSHAFT SEAL ON MY AUTOMATIC TRANSMISSION. TOOK INTO SHOP TO HAVE IT DIAGNOSED, FOUND OUT SOMETHING IS WRONG WITH THE BEARINGS DO TO LOW FLUID. THEN I FIND OUT THERE IS A SERVICE KIT AVAILABLE FOR THIS SEAL ISSUE, HOWEVER WE HAVE NOT RECEIVED ANY NOTICE OF SUCH SERVICE KIT BEING AVAILABLE. I'D LIKE TO KNOW WHO IS GOING TO COVER THE $2500 ITS GOING TO COST TO HAVE MY TRANSMISSION FIXED AS OPPOSED TO A FEW HUNDRED DOLLARS IT SHOULD HAVE COST ME HAD I BEEN AWARE OF THIS SERVICE KIT. *TR

NHTSA ODI #10705619

132,256 miles · Jul 17, 2014
EnginePower TrainVehicle Speed Control

I WAS DRIVING AT 45MPH WHEN ALL OF A SUDDEN, THE CAR STOP RUNNING. I HAD TO PULL OVER AND CUT THE CAR OFF. I STARTED THE CAR AGAIN AND IT WENT ABOUT ONE MILE BEFORE IT CUT OFF AGAIN. THEN A WRENCH SYMBOL CAME ON THE LEFT SIDE DASH BOARD. I DROVE THE CAR HOME AND IT CUT OFF ON ME THREE TIMES BEFORE I COULD GET IT HOME. I LOOK IN …

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I WAS DRIVING AT 45MPH WHEN ALL OF A SUDDEN, THE CAR STOP RUNNING. I HAD TO PULL OVER AND CUT THE CAR OFF. I STARTED THE CAR AGAIN AND IT WENT ABOUT ONE MILE BEFORE IT CUT OFF AGAIN. THEN A WRENCH SYMBOL CAME ON THE LEFT SIDE DASH BOARD. I DROVE THE CAR HOME AND IT CUT OFF ON ME THREE TIMES BEFORE I COULD GET IT HOME. I LOOK IN MY CAR BOOK TO SEE WHAT THE WRENCH SYMBOL MEANS AND IT SAYS THAT IT IS THE THROTTLE CONTROL/POWERTRAIN. *TR

NHTSA ODI #10611341

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