2004 Mercury Mountaineer: sudden loss of power

6 of the 210 complaints about the 2004 Mercury Mountaineer describe sudden loss of power.

owner complaints: 6
of this car's complaints: 3%
typical mileage: 93,000
recalls: 0

Is there a fix? 19 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2008
1
2006
1
2005
4
2004
6
2003
3
2002
2
2000
2
1997
1

What owners say

Filed Nov 24, 2014 · Transmission · 99,000 miles · TX

Tl* the contact owns a 2006 mercury mountaineer. The contact stated that while driving 70 MPH, the vehicle lost power without warning. The vehicle was merged to the side of the road where it was restarted. However, the vehicle failed to accelerate past 35 MPH. The vehicle was taken to an independent mechanic where the technician diagnosed that the power train needed to be replaced. The manufacturer was made aware of the issue. The failure mileage was 99,000. The VIN was not available.

Filed Jul 5, 2013 · Engine, Steering · 70,000 miles · SD

Tl* the contact owns a 2004 mercury mountaineer. The contact stated that while driving approximately 40 MPH, the vehicle stalled and there was a sudden loss of power steering. The contact mentioned that the check engine warning light illuminated. The vehicle was taken to a private mechanic where the failure was unable to be replicated. The manufacturer was notified of the failure. The vehicle was not repaired. The approximate failure mileage was 70,000 and the current mileage was 110,000.

Filed Jan 19, 2013 · Acceleration, Electrical · 130,629 miles · MD

Engine stalls when activating cruise control which results in hazardous driving situation due to loss of power steering and brakes. Have to pull over to side of road, put the vehicle in park and restart. Starts every time. Has repeated 3 times. This is a serious flaw in the ford electrical computer design to result a failure mode that stalls the vehicle engine while under speed.

Filed Jan 16, 2012 · Engine · 93,000 miles · CT

Shut off while driving lost power steering etc.

Filed Nov 24, 2009 · Electrical · 88,500 miles · MO

While driving 40-45 MPH and using the cruise control, car suddenly shut down. Check engine light and battery light came on. Loss of power steering, power brakes, acceleration. Was able to steer SUV to off the road but was very difficult to do so. Nearly ran off a 10 to 12 foot drop off into a drainage ditch. This has happened several times before. Car max (where we bought SUV could not duplicate the issue so they sent it to metro ford in independence, mo and on the first time it happened replace the throttle position sensor but that did not fix the problem). The wrench and fail safe mode came on this last time but the persons repairing it indicated they found no codes for it and were unable to re-create to diagnose. From research I know this is a problem with other vehicles of this type (both the loss of electrical power and the no code found situation) but we came very close to an injury related accident because of this.

Filed Sep 21, 2009 · Acceleration, Electrical · 86,000 miles · MI

While driving 35-45 MPH, car suddenly shut down. Check engine light and battery light came on. Loss of power steering, power brakes, acceleration. Maneuvered vehicle to nearby parking lot, waited, and then restarted the vehicle. No problem in restarting vehicle and all warning lights were off. Used cruise control prior to incident. Intermittent problem; unable to re-create for ford dealer to diagnose. New battery was installed by ford dealer in winter 2009.