Me and my wife purchased a vehicle from a private seller to use for personal commute. A month later we started to notice more issue were occurring with the car then stated from the seller. I took it to an auto body shop to get it inspected and possibly serviced and upon that inspection the clerk stated that there was a milage adjustment done to the vehicle. We contacted the seller to try and return the vehicle and receive our money back, but the dealer refused and requested us to resell it.
2010 Mercury Mariner engine problems
63 complaints (23% of all complaints for this car). Typical mileage when it fails: 52,000.
- owner complaints
- 63
- of this car's complaints
- 23%
- typical mileage
- 52,000
- 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 2010 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 2010 Mercury Mariner owners say
Most recent owner complaints, unedited.
When the weather is hot (close to 100 degrees or more) and I am driving with the a/c - my vehicle on 3 occasions will not start after parking the vehicle and trying to restart it. The red padlock sign blinks and it won't start. At first it is trying to turnover but then will continually sound worse and all other warning lights go haywire. I leave the car alone for half a day and it starts up again like nothing happened. On the fourth occasion, the car stopped while driving, just a quiet shutdown and the car glided. This time it did not work for over 24 hours and then started up again like nothing happened. Multiple mechanics and also the dealership cannot figure out the problem because by the time i have it towed to shop, it works again. They did a full check on the car and cannot find anything wrong and there were no diagnostic codes. This issue happens when the weather is hot and poses a safety concern as now it is shutting off while driving and I become stranded each time. (First incident happened 8/25/18, last incident 5/14/22) Total of 4.
I was driving when it felt like the vehicle was reving in park then the "wrench" icon appeared on my dash. I went a couple blocks & my vehicle felt like it wasn't shifting automatically as it should. I pulled over & turned it off. It started right back up with no lights on, I went half a block & stopped at a stop sign but while stopped the engine reved up. I was worried I was going to be in an accident. Then the "wrench" light came back on, since I was close to home I figured I'd just try to get home. About another block, the check engine light came on & was making strange noises. I kept my vehicle at about 5-10 mph & got it home. My car was very jerky.
The vehicle was in motion at a stoplight. The light had turned green, and the vehicle was breaking to stop behind the first vehicle. I pressed the gas pedal to follow the first vehicle and the car stalled. The car could not be turned back on or put in motion. There was no indication of a problem prior to this throttle body failure. The car was pushed off the road by 3 people and into a nearby parking lot. The problem that made the vehicle unsafe was a defective ford throttle body. The reference consumer satisfaction program 13n03. I received the recall notice june 2014, but ford only suggested a recalibration (not replacement). The recalibration was completed at ford autonation on june 23, 2014. Ford had estimated a throttle body reduction in movability and not failure. The mileage of this mercury mariner on the date of repair was 142551 and the in-service date, 06/18/2010. Therefore, the reimbursement should be covered under ford's extended warranty of 150000 miles/10 years. The repair was completed 06/08/2020. Ten days prior to the expiration of the extended warranty. Ford claims they will not reimburse for the throttle body failure. This was well-documented in the previous claim 13n03 and this case should be reopened, based on the fatality possibility of a throttle body failure with the original part that came with the vehicle, which was also re-calibrated per ford's recall in 2014. This incident proves that ford's re-calibration did not prevent failure of the throttle body. Asking for a recall for the throttle body for the similar makes and models still in circulation as it's a safety hazard and also reimbursement for this service for vehicles that had it completed.
Having two issues. The first one is the check fuel intake warning light comes on and my check engine light stays on. This appears to be causing my car to cut out dangerously at intersections as well as the wrench light to come in and my car 'limps' home.
Car stopped running wrench light came on started motor put it in gear tried to go regular pace car did not go it is very slow no gas peddle turned it off let set for 2 hrs. Started back up runs ok but check eng. Lite came on called dealer
While driving this vehicle we have stalling issues. The issues have happened while driving the car on the road while making turns and stopped waiting for a light, the vehicle stops running without warning. The car will restart after you have placed the car in park and restart. The dealership has not been able to duplicate this problem.
Tl* the contact owns a 2010 mercury mariner. While driving approximately 50 MPH, an unknown wrench warning indicator illuminated. The accelerator pedal was depressed, but the vehicle failed to accelerate. After waiting a few moments, the vehicle restarted. The failure recurred numerous times. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 80,000.
While driving normally suddenly it looses power and throttles before turning off. It is a hazard because I may be hit if it happens in the freeway.
I suffered an accident because while driving in a highway, I could not steer the wheel and the engine stop working. I wrote before because of what happened and have not received an answer. What can I do? Thank you
Questions about the 2010 Mercury Mariner engine
Does the 2010 Mercury Mariner have engine problems?
Owners have filed 63 complaints about the engine of the 2010 Mercury Mariner, 23% of all its complaints.
At what mileage do 2010 Mercury Mariner engine problems start?
The typical (median) mileage in owner complaints is 52,000 miles.
Was there a recall on the 2010 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 2010 Mercury Mariner problems
Acceleration 66Fuel system 63Steering 61Transmission 60Electrical 29Visibility 8Body 7Driver assistance 6Brakes 5Airbags 4Lights 4Suspension 2Seat belts 1Wheels 1
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