RepairPal Certified shops can diagnose and repair your 1998 Ford Ranger. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Professional scan test required - that’ll determine if it’s a signal - OR - speedometer failure..
Can’t imagine how you “checked the sensor“ by any other reliable means.
Illuminated ABS light is an important clue! Good luck!