I have a 1993 Ford Taurus 3.8L V6 automatic. I used a “ford digital code reader” to retrieve these fault codes from my car: code 157: mass air flow sensor fault, low voltage, code 172, HEGO(HO2S) sensor fault/lean, Code 452, vehicle speed sensor(Vss) signal fault. Can you tell me what these codes mean and what is wrong with my car?