06 pt cruiser temp gauge stays on con the dash and the heat inside was not hot i ran the codes then i changed coolant temp sensor and the thermostat now i have heat but check engine light still on an temp gauge stays on c codes are p0117 and p0128 eng coolant temp circut low imput and coolant thermostat vaulve below control range i need help please thank you

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Yes. Feel the hoses at the firewall with the engine at temp and make sure both are hot. If 1 is hot and the other cold most likely a core plugged.

I would change the sending unit for the temp gauge make sure that is full of coolant take the radiator cap start it fill coolant until the the thermostat opend to be sure it did. Then make the coolant is circulating and make sure it is full. The heater core could also be plugged

Is there 2 Sensor's on your Car?

One for the Gauge and one for the Computer?

sounds like an air pocket in your cooling system need to bleed system and add missing coolant

Sounds like the engine head gasket needs to be replaced.The gasket has deteriated from the engine cylinder and coolant passage and overheating the coolant. Sometimes you will see coolant mixed with engine oil, or milky solution on the oil dipstick

you need to get the thermostat changed. The thermostat controls how much coolant runs around the engine and sends signals to your temp gauge to indicate how hot the engine is.
if the thermostat is faulty it wont sent signals to the temp gauge and wont open up to allow coolant to run around the system. Your heating is run by coolant, behind the dash there is the heater matrix hot coolant runs into the matrix which gets blown inside the cab.
Fitting a new thermostat will fix all the heating and gauge problems. if your technical minded you can buy a thermostat from an autofactor (or ford, but they are expensive from ford). a garage will charge about £30-£100 ish for a new one.

hope this helps :-)

Flush rad & change coolant & thermostat. Check operation of rad fan, & make sure it is coming on when engine reaches normal operating temperature. Be sure to bleed air out good when refilling rad/cooling system. Start engine & turn heater on when refilling & let rad fan come on & off at least 2 or 3 times before putting cap back on rad, and refill rad as needed as you do this. then fill return bottle to proper level & see what happens.

did you check the fluid level by removing the rad. cap? Radiator should be full to top. If Chryslers are low on coolant, the heater will not blow warm air.

In general I know of no reason per se to replace the thermostat and temp sensor because you replaced the radiator fan. If the temp gauge seems to be staying in the 1/3-2/3 of full scale, and there is no apparent engine control issues as the engine warms from cold to operating temperature then there is no obvious reason to replace those items. Other than fan motor failure is there any reason for you to believe these other parts are at fault?You can get a free fault code readout at an Autozone parts store which would highlight a temp sensor problem, but there is no fault code for the thermostat except maybe the one for engine running cold for too long a time after start up. You could also check the resistance of the temp sensor which should run around 10-14,000 ohms when cold and drop to 700-1,000 ohms when warmed up.
I don't know about the issue of replacing the thermostat because I don't know which engine you are working with. So let me know an