01 Marquis wont go over 55mph

Asked by Feb 12, 2016 at 03:40 PM about the 2001 Mercury Grand Marquis LS

Question type: Maintenance & Repair

Drove on highway for first time and car wont go
over 55mph. The Trac Cntrl light blinks on
dashboard. I am not sure where to start.

2 Answers


Do you happen to know if the car will shift into its last gear? At what RPM does the car hit at 55 mph? If it isn't going into the final gear, your transmission may either need an overhaul or a rebuild. If you know the car is going through all the gears it may be just a sensor not kicking back the correct info and triggering the trac cntrl to malfunction.


Could be a lot of things, Also may want to have the catalytic converter checked out, may be plugged. And need to determine if it is in the engine giving trouble. Turn the track system off if you don't need it. (driving in snow)

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