One problem related to transmission solenoid has been reported for the 2002 Ford Taurus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Ford Taurus based on all problems reported for the 2002 Taurus.
While driving at 65 mph, transmission warning light came on. Vehicle downshifted automatically, decreasing speed and increasing rpm's significantly. For remainder of trip, vehicle could not accelerate consistently and could not hold a constant speed. The following day I took it to a dealer who informed me that a solenoid had failed and replacement cost ~$700.