Earlier this week when I would come to a complete stop the speedometer would display 45m.p.h. Yesterday , when at a complete stop it would display 80 m.p.h. At 20mph it would read 100m.p.h., at 40mph it would read 120 m.p.h.

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Sounds like you have a speedometer issue more than a speed sensor issue. Hands on testing is needed to get into the cause of failure. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.