Mercury Montego Problems

Check Engine Light and Poor Throttle Response on Mercury Montego

Problem Description and Possible Solution

A defective electronic throttle body (ETB) can cause the Check Engine Light to illuminate and could have limited to no throttle response. Our technicians tall us that replacing the electronic throttle body will commonly correct this concern.

(48 people reported this problem)

Mercury Montego Vehicles With This Problem

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Average mileage: 132,686 (50,000–210,315)
3 model years affected: 2005, 2006, 2007
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Viewing 1-18 of 18 comments
Wrench light on dash came on. Down with power and up with rpms. Limped it to work and after turning engine off and restarting no further problems until today, then 2x in one day!!! Worried this could cost me!!! A lot!!!
While driving on express ways the car almost shuts down like as if its gonna stop,wrench light and engine light pops up. Cant go over 50 when this happens. Havn't got it fixed. to expensive. think i should get another car.
Freequently when shifting from neutral to reverse, or sometimes from neutral to drive, the car surges. It does it more freequently when the engine is hot from driving around (like running errands and backing in and out of parking spaces) Once, we got the wrench light, but it went off after re-starting the car. Once the car went into "limp home mode" but again, after turning it off, letting it cool, and starting it again, it was back to normal. Another time the check engine light came on, so we took it in to have the codes read. The mechanic cleaned the mass air flow sensor as it looked "extra dirty" A couple days later, the problem came back. Now, about a month after the mass air flow sensor was cleaned, we did a lot of stop and go driving, backing in and out of a couple driveways and parking lots, and the check engine light came back on. By the time we could get it to the mechanic, the check engine light was no longer on and of course the mechanic could not get it to duplicate the problem.
yellow wrench light comes on which the book says is engine throttle body. Its about a $560 repair which i dont have
So for a few days now my car has started jumping forward when stopping. Now this am my car went into limp mode. I am not able to go above 30 miles or so and when you push the pedal, no power or fuel being able to get thru. Wrench light came on, went to auto zone..code 701... Tranny
hesitation in shifting with auto was due for transmission flush. check engine light on. took to dealership and said throttle body needs replaced. wants over $700 to replace. not sure if we should proceed with having the dealership fix it or not.
While driving at 45mph my car check engine light as well as the throttle light came on. I did some research and took my car to the local Ford Dealership in Rosepine La. My throttle was cleaned and the engine light was turned off. It drove fine for one week and the same thing happened again. A new throttle was put on my car. I drove it again for about 20 miles turned on my A/C and the same lights came on (engine and throttle). Went back to dealership and was told it could be wires in the harness. I was told that they could not find the problem and that the wires in the harness were taken a loose and put back on. The car ran fine for 100 miles (between 65mph and 75mph) and then both the throttle and check engine lights came on again and I was approaching a stop sign. Every time this has happened I have been either slowing down or attempting to accelerate. I cut my car off and restart it and I can drive a little further, however, on really hot days I have to stop and restart every couple of miles before I can drive and considerable distance.
I have the same problem. Took to dealer and need a new Throttle body and software updates. $$$$ About $1,000.00 but...this is the first major repair on this vehicle - why did they stop making the CVT transmission and this line of vehicle
Electrical Problems out the ying-yang. Car still runs well but kind of annoying and embarrassing with guests in the car.
After enging gets warm (slow behind traffic or stopped), the engine starts galloping. If I do nothing, a chimne occurs, instrument panel goes dark and zero, A/C panel goes off. A few seconds later, all comes back on, no galloping, no codes registered on my HUM device, No issues identified. If I turn the Auto Climate Control off when the galloping starts, the ablve does NOT happen. When the galloping stops, I turn Climate control back and as normal.
After many years of "check engine" lights going on and off, finally had to have throttle body assembly replaced after it started over-revving and throwing the engine into the "engine failsafe mode. Replacement by dealer cost over $1,500.
Engine surges especially after it gets hot. Read several reports, that indicate it's a fairly serious problem, light break presser will not stop the car. No accidents yet but concerned about this problem that has persisted for some link of time.