Having issues with p0128 setting on aunts 07 hhr. When code sets a/c is disabled. Once code is cleared a/c is allowed by pcm again. Problem is intermittent, thermostat was bad and was replaced with new part and that lasted 2 months. Code set again and thermostat was pulled back out for inspection and looks good. Wiring looks ok will ohm the wires tomorrow but since it's intermittent I'm guessing it will ck out good. My uncle said someone told him the ecm is bad. My question is can I disble that code and will a/c still work if the fault reoccurs