climate control valve sensor

The serpentine belt should be replaced now.

The throttle body probably could use cleaning at your car's odometer reading. There is no carburetor, BTW.

I doubt that the "climate control valve sensor" is the problem, but it is possible that the "coolant flow control valve position sensor" may have failed. It is true that the failure of this sensor will not impair driveability. That sensor is part of the engine coolant heat recovery system.

 

P1116 or P1121 for the coolant control valve/sensor is often related to low water level, which is often due to a leak in the engine water pump. Check the coolant level in the expansion tank, and check for pink residue on the forward passenger side of the engine, particularly the top of the A/C compressor and the inside of the water pump pulley. Assess the condition of your belt while you are at it, but it is most likely due for replacement. At 150K, you also need spark plugs and a new PCV valve. Change your transaxle fluid too. These cars do not require a lot of attention, but a little TLC goes a long way.

Cleaning the throttle body will not have much impact on MPG -- cleaning the MAF sensor might, however -- but if you have a lot of carbon buildup in the bore, it is possible that the throttle plate will stick shut and make the car undriveable.