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The hybrid models have a coolant pump that cools control electronics. The pump can fail or spin slowly, which causes a Check Engine Light to illuminate and complete engine shut down.
Resources for the Repair and Maintenance of your Mercury Mariner Hybrid
Mercury Mariner Hybrid Models:
Mercury Mariner Hybrid Problems
Coolant Pump on Hybrid May Fail and Cause CEL/Engine Shutdown
Electrical & Lights --
Verified
Hard driving conditions may cause rear motor mount to crack
Electrical & Lights --
Verified
Hard driving conditions, including quick starts from a stop and hard acceleration up hills, can cause the rear motor mount to crack. The broken motor mount needs to be replaced, otherwise damage to the hybrid drive system may result.
Check Engine Light With Code P0442, P0456, and/or P1450
Exhaust & Emissions --
Verified
The Check Engine Light may illuminate with code P0442, P0456, and/or P1450. These codes are related to the EVAP system. Our technicians tell us that if no EVAP system faults are confirmed, updated software is available for the powertrain control module (PCM) which should correct this concern.
Mercury Mariner Hybrid Questions and Answers
swhite1649, 2006 Mercury Mariner Hybrid, 4 Cylinder, Lac Du Flambeau, WI
My abs light...needs to be serviced followed by 4x4 needs to be serviced. What specifically does this mean? Is it still driveable and whay kind of cost could i be looking at approximately.
Visitor, 2007 Mercury Mariner Hybrid, La Crosse, WI
fwd has always worked normally. suddenly fwd when there was about an inch of snow signaled that it was deactivating. Car is almost useless without fwd. Replaced all tires at suggestion of dealer...
plmckibbin, 2006 Mercury Mariner Hybrid, 6 Cylinder, Chesapeake, VA
How much does it cost to replace the bsttery that the car runs on when using electricity.Not the normal battery that is used to start the car. The one that sits in the back and is recharged when yo...
gary2012, 2006 Mercury Mariner Hybrid, Dundalk, MD
Dealer just told me I need this module to fix a message!!!
okranch, 2006 Mercury Mariner Hybrid, Overbrook, KS
I just want to know approximately how many years the electric motor batteries last.
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Mercury Mariner Hybrid Reviews
Monday, went to open the car, and neither remote would work. The touch pad on the door also would not work. Opened the door with the key, and the motor would start, but could not get out of park. None of the digital/electronic displays worked. Windows nor locks would work. Air conditioner and cruise did. I was able to drive the car by disabling the "Park/Transmission" lock switch. The dealer doesn't seem to have an idea as to what is wrong.
The break issue posted above is caused by a faulty speed sensor in the cruise control. Mine was under warranty, but it took them maybe 30 minutes. I had this, and the real tailgate release break. Otherwise no tires, no repairs nothing for 110K miles. It is a great car.
My 2008 Mariner 2WD had to have the computer replaced at about 38,000 miles. It's failure caused the car to quit running on the highway, very dangerious. The good news was the hybrid feature allowed me to get to a dealer and it was covered by the 60,000 mile powertrain warrenty. Now at 59,000 mile the AC compressor failed and had to be replaced (not warrenteed) to the tune of $1,100.00. I am very dissapointed having had many cars with greater milage and not had to replace a major AC component. Has anyone else had a problem like this?
27 MPG on highway average. 30 plus MPG mixed drving, 50/50 highway backroad. Superb for AWD SUV!! Road noise drives me nuts. Yea that is only complaint. Road noise entering cabin is horrible. Purchased new, currently at 50K.
I've had issues with the brake system on this car. I get check brakes warning lights regularly but nobody can find a problem. Sometimes the brakes grab sometime they feel soft and it changes from mile to mile. I've had to replace the brake pump and master cylinder which cost me $1400 for a different break issue. It was expensive because these are designed as one part. But the current problem was not resolved by this.
Otherwise I am very satisfied with the car. Great mileage, good comfort and handling. All you could ask for in a small SUV.
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