hi

my problem is the "S" light flashing but the car shift well and normal it come blinking after hit a speed reductor, i check the trans and not have a visual damage below the impact was in the bar ot in the trans.

thanks for the help and sorry for my english

 

Five out of ten times, the TCM (Transmission Control Module) is on the top of the list of usual suspects for the flashing S, the second worst offender is the VSS (Vehicle Speed Sensor).
Have you noticed any issues with the speedometer when this occures?
You could have no more than a loose connection at the VSS.

P

 

Before you start replacing expensive parts, I would suggest that you retrieve the stored code.
At the top of the passenger side kick panel you should find a BLUE 2 pin connector.
Jumper that connector and turn on the key; watch the 'S' Light blinks for the code.