Having problems with your Mercury Mystique ?
O/d light Last night I was driving home and my o/d light came on and stayed on what does this mean? I have a 1988 Mercury Mystique
This light means over drive. Look for a switch that has overdrive on it or when you put it in gear you are putting the transmission in D with the letter O around it.
Repair Help & Product Troubleshooting for Mercury Mystique
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