the sensor has a 12v reference, so youre good, about 10v at high is good. some sensors, like the map sensor have only a 5v ref. so id say the sensor is working properly... whats the car doing? still a hard start? what code do you have? you need to test at the ecm to ensure the wiring is good all the way to it, most likely is, since both high and low ref are good to the connector