Where is the Engine coolant temperature sensor harness on a 2003 Mazda 6?

Question

Trying to troubleshoot a p0128 fault

Answer 1

P0128 Coolant thermostat stuck open

This is a common problem that has plaqued Mazda, they have revised a TSB for this concern where the PCM is flashed to a new logic.TSB No. 01-021/13