Which statement about the ban on driving poorly maintained vehicles and inspection by police officers is correct?

1. ①A moving vehicle cannot be stopped, so it can be inspected only after it reaches its destination
2. ②The officer may stop a vehicle believed to be poorly maintained, ask for the vehicle registration certificate or driver's license, and inspect its equipment
3. ③If a maintenance defect is found, the vehicle must always be towed away on the spot regardless of how serious it is
4. ④If a company makes an employee drive a poorly maintained vehicle, only the employee who drove has broken the law