P0128 2006 Nissan Sentra - Service Engine Need more solutions

Question

I have a P0128 code on my 2006 Sentra, the service engine light comes on immediately after starting engine no matter the engine temperature. I have changed the thermostat and ECT, disconnected battery for 10 minutes but I still have the Service light. I have had the code checked at two seperate places.

Answer 1

is the car over heating at all? did you install a factory Nissan thermostat?

check to see if the thermostat is opening.

Answer 2

This code is set by

1- bad ECT.

2-Bad Thrmostat.

3- Cooling fan pull high current than usual OR\and  it run faster , longer period.

4- Faulty IAT sensor.

5- Low coolant level.

Good Luck