Problems · by component
2009 Mercury Mariner power train problems
44 owner complaints to NHTSA about the 2009 Mercury Mariner cite power train, 14% of all 315 complaints for this model year.
Complaints
44
14% of all complaints
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
Reported by owners
What owners say about the power train
Verbatim from NHTSA complaints, newest first
“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.”
“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.”
“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 ?”
“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.”
“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.”
“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.”
Showing 6 of 44 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.