My epc light is on. I had the fuel pump replaced now the car will not start. on 2003 Volkswagen Jetta

2 weeks after the fuel pump was replaced, I notice the car had a hard time starting so I replaced the dayco belt tensioner and thermostat. Should I have the person who fix the car go back and redo the wiring or do you think I need to replaced the speed censor? Please help! thank you

Asked by for the 2003 Volkswagen Jetta