Question about 1997 Mercury Grand Marquis
Car has been sitting around for quite a while also heater vent will not work
If the o/d light is flashing, you may have a bad speed sensor. The speed sensor tells the computer how fast the car is going. A scan with a scan ool will give a code that will tell you if it's a bad speed sensor. Some auto stores will scan for free if you buy part from them.
Posted on Jan 09, 2009
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Posted on Jan 02, 2017
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