Question

p0125 and p0128 are being shown on 2002 Nissan Sentra SR 2.5. Will this prevent my car from turning over?

Answer 1

p0128 is most likely a stuck thermostat, replace the thermostat and add coolant.

if the car overheated, you may have a damaged head gasket. if coolant gets inside the engine it may be hard to start it. the head gasket will have to be replaced. 

check to see if the water pump is not leaking also.