First, you are talking about the MPX4250, correct?
1. Voltage or pressure? The maximum supply voltage is 5.35V. The pressure range the MPX4250 is able to sense is 0 - 250kPa and the maximum pressure the MPX4250 can be exposed to without being damaged is 1000kPa.
2. No. It is below the maximum allowed pressure (1000kPa), the output will just be saturated at its maximum value of about 4.9V.
PS: If this answer helps to solve your question, please mark it as "Correct" or “Helpful”. Thank you.