The scan tool i have will not read sensors or tell me anything other than the code that has been set. i don't want to go to a mechanic and would like to know the most likely problem causing this code. i am not the one driving the car and am not sure when and under what conditions the code is being set, i think it is happening after the car is warmed up and been driven a while.
i replaced the thermostat and i am still setting p0128 code.what next. on 2006 GMC Envoy
Asked by for the 2006 GMC Envoy
If you were able to read data, the temperature sensor needs to be monitored. And by the way, we are Technicians/Mechanics.
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Could also be that water temperature sensor is not working right.
Just looking on a wiring diagram and was wondering where the water temp sensor is, all I see is a ECT for the computer, which also runs on the CAN line to the instrument cluster. Could you help me out, Please.