Driving at highway speeds (60pmh) it would loss power and kinda limp along. I can pull off to the side of the road and turn the car off and start it bake on again an run just find after that. This has happen three time since. It is become really dangerous.
2011 Mercury Mariner engine problems
14 complaints (16% of all complaints for this car). Typical mileage when it fails: 49,000.
- owner complaints
- 14
- of this car's complaints
- 16%
- typical mileage
- 49,000
- crashes
- 0
- recalls
- 0
Which part fails
Owners did not name a specific part.
At what mileage
Complaints by mileage at the time of the problem.
0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+
Mercury Mariner engine problems in other years
Specific symptoms reported on the 2011 Mercury Mariner engine
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Electronic Throttle Body Malfunction
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
PE13003
What 2011 Mercury Mariner owners say
Most recent owner complaints, unedited.
I was driving and the engine cut out on me and I had to pull over it wouldn't take any gas when I pulled over and stopped I shut the engine off and turned it back on I ran ruff I shut it off again and turned it back on then it ran fine. Then about 3 hours later it did the same thing again. I am afraid to go on the highway with this vehicle what if I am in the high speed lane and this happens I have only had the vehicle 3 months I bought it from rodman ford in foxboro massachusetts. Thank you [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6)
I was driving through my neighborhood on the way home from going out to dinner. I went around a curve and then when I started going up a slight hill, the engine surged. I didn't think to much about it until I lost almost all power. I could not get up to a speed higher than 5 miles per hour. I was able to get within one block of my residence. I waited for about an hour as I looked up the diagnostic code that my odb2 scanner gave me. I found out that it is code p2111, throttle actuator control system - stuck open. I went back to my car, after about an hour, and it started just fine. I was able to drive my SUV to my local ford dealer, with someone in another car following to make sure that I didn't have a repeating issue. I did a night key drop tonight, the same day as when the issue happened. I included the warranty letter that I had received from ford regarding the throttle body replacement. I cannot understand why ford would not issue an official recall to fix this ongoing problem. I feel very fortunate that I was not on a busy interstate highway or otherwise congested road when this happened. Will there have to be numerous reports of fatalities or serious property damage before this issue is actually rectified?
The vehicle lost all power from the motor and I had to cross lanes to get to the shoulder while free wheeling. This has now happened on 3 occasions. The motor was still running but with no pulling power. Once I had switched the motor off and waited a few moments I was able to restart and the vehicle operated perfectly.
On the morning of september 10, 2013, after about a 30 minute commute to my place of work, I pulled into my work driveway, and my 2011 mercury mariner stalled. The engine seemed to cut off, the wrench light came on, and my vehicle rolled into the parking spot. Unsure of what had happened with my vehicle (as it had never happened before), I immediately called my local ford dealership service department. The service manager was extremely helpful and told me it sounded like a throttle body problem, as his service department has replaced a number of these on both the ford escapes and mercury mariners. On my lunch break, I drove over to the dealership and made it with no stalling out problems. The manager then told me he would drive me back to work in the vehicle to see if it would "act up." it did not "act up" while he drove me back to my place of work, but on his way back to the dealership, it stalled out on him while he was attempting a left turn. He had to turn the vehicle off for approximately 30 seconds to let it reset. He said at this point the check engine light also came on. He got it into the service department and hooked it up to the computer. The computer generated code p2111, electronic throttle body assembly. He luckily had one in stock and it was promptly replaced. I have not had any more stalling out issues with my mariner and the issue appears to be resolved. This problem could have had deadly consequences had it stalled out at the wrong place and wrong time, particularly in an oncoming traffic situation. As the service manager mentioned to me, this has been an ongoing problem that is facing a potential recall.
My son and I were on the way home from football practice around 8:30pm and as I was turning right from a stop light the vehicle started slowing down and shaking. I pulled right over turned the car off and on. Once I got back on the road it did it a second time and so I proceeded to pull over and turn car off and on again. I was close to home and finally made it home.
On june 6th, is as going approximately 35 miles per hour when the car went into idle mode. I pulled to the side of the road and the car restarted after cranking it several times. The problem continued but only when traveling at lower speeds. I made point of traveling the back roads when possible. On the 13th of august, I was on the freeway when it happened. I was only able to travel a few 100 feet and it continued this way till I got home going the back roads again. The car has sat there ever since. My husband has been out of town for three months and returned that night. He had the codes checked and they read p2111 and p2112. He did research the problem and came up with many complaints of defective throttle body.
As I was driving my 2011 mercury mariner it suddenly lost the power to accelerate (engine still running). The wrench light illuminates at this time. I could not do anything to increase speed (pressing on the accelerator did nothing). The only fix is to shut down the engine and re-start. The mileage is 69,xxx. This first occurrence happened on 7/25/2013, however, the same symptoms have occurred randomly several times since that time. I explained the symptoms to my local ford dealer service department and indications are a defective throttle body.
The vehicle has quit running suddenly without warning at highway speed two times and has quit running at low speed or at stop lights or has went to rough idle in limp home mode with no power available to avoid heavy traffic. Turning off ignition and waiting 3 minutes and restarting yields normal engine operation until it stalls again. Ford service has diagnosed defective throttle body but will not warranty the defective part even though it is covered under emissions controls.
Driving highway speed and vehicle stalled, also stalled after taking off from stopped position. Pulled off of the side of the road and turned engine off and was able to restart the engine.
Questions about the 2011 Mercury Mariner engine
Does the 2011 Mercury Mariner have engine problems?
Owners have filed 14 complaints about the engine of the 2011 Mercury Mariner, 16% of all its complaints.
At what mileage do 2011 Mercury Mariner engine problems start?
The typical (median) mileage in owner complaints is 49,000 miles.
Was there a recall on the 2011 Mercury Mariner engine?
There is no recall for this problem on this model year.
What year does the Mercury Mariner have bad engine?
The Mercury Mariner model years with the most engine complaints are 2010 (63 complaints), 2009 (60 complaints) and 2008 (20 complaints).
Other 2011 Mercury Mariner problems
Fuel system 28Transmission 24Steering 20Acceleration 15Electrical 6Visibility 6Airbags 2Suspension 1
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