2006 Saturn Ion 2, 2.2L i check the live data on the ETC when driving 65 MPH the number range from 186 to 188 is this the correct number range? will the thermostat cause the engine to burn more gas? because my gas mileage not good.
Thermastat is sticking an the clutch fans along with good speed is keeping it from blowing up I'm guessing at its worst when you stop you hear bubbling sound? If not just a matter of time. Get the therm replaced an make sure u get the factory replacement someone could of put a hotter therm in order to get better heat in winter or the mods your doing are causing the extra heat next MOD would be a bumped up intercooler along with the water pump that's my answer hope it helps.
If the fan is properly working you may want to replace the coolant sensor for the computer, it’s not the one for your gauge or temperature warning light this one is the computer’s temperature sensor that the engine uses when your car is up to temperature and the computer will switch to a closed loop that helps the computer to fine tune the fuel mixture, if this sensor is not operating properly the engine will never go to a closed loop status and you will notice your fuel mileage drop noticeable.
SOURCE: where is the thermostat located on my 2006 Saturn ion 2.2L?
Under the thermostat housing mounted on the engine at the "engine side" of the upper radiator hose. That "usually" happens when the thermos is stuck open & the computer is getting cool readings from the anti freeze because its flowing too freely. More fuel is added due to bad temp readings. Drain some coolant, remove rad cap, remove thermos housing, Clean gasket or r/r O ring & replace thermostat. Reinstall. Refill cooling system, let it run.refill overflow bottle after warmed up. Ck for heat & leaks. Good luck
SOURCE: when i view live data what the ETC 'F suppose to read?
ECT Sensor
88-105°C (190-221°F) Depends on ambient temperature
code p 0128 refers to coolant thermostat--coolant temp below thermostat regulating temperature ===causes mechanical fault
For that code to appear the answer is most likely yes --it will affect fuel economy
Why because if the coolant is free to flow then the engine operating temp is not reached and so the engine coolant sensor reports that the engine needs more fuel and the air fuel mixture is adjusted to rich as a result
indicates a thermostat that is stuck open
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