Hey everyone how are you I'm new on here and was just wondering my tires were slashed the other day and when you go to start it it still says tire pressure normal but so I don't know what wrong with it any help would be appreciated.

What year make and model we working with here?

it says 2000 pa. which uses abs wheel sensors to measure distance and converts that to pressure by a calculation. not very accurate and you have to be moving

As Justin says, your car uses differences in readings between wheel speed sensors to determine if one wheel'* air pressure is off. A flat tire will rotate at a higher rate of speed than a fully inflated one. The system will say pressure is normal until you start driving, which obviously you would not do with slashed tires.