Mazda Repair: Mazda mpv 2000 starting problems, mazda mpv, battery cable

Question
When I turn on the ignition the alarm activates and I can't turn on the vehicle. then the alarms goes off and I can't do anything.  Also tell me if it is a code problem and how I can solve it.

Answer
this is dificult not seeing the vehicle, if there was no problem starting before changing the sensor i would start by going back and reinstaling the original sensor, there maybe a defect in it. disconect the neg battery cable 1 min then connect the battery and see if it starts