my digital speedometer suddenly is not working correctly, I have 88,000 original miles and now it reads 140,000 and my MPH is off too. If I go 10MPH eat reads 40MPH....Is there a fuse or reset button to fix this???
Try a new speed sensor....one bolt and some twisting and its out. Do NOT get it smogged before fixing it, they will write down any mileage that appears and you will not be able to fight it if its wrong.