Mazda Repair: speedometer dead, speed sensors, fuel consumption

Question
engine light on. been told might be speed sensor.is it good diagnostic? if it is where is it located? thank you very much.h

Answer
speed sensors are used for the ABS system so it's a very bad diagnostic.


is it on steady or does it flash

if on steady it's in the emissions system and will only reduce drivablitiy, fuel consumption ext


if it's flashing stop driving it now and have it serviced there's something posibly serious worng with the engine