My car has the code p0116 it says its running hot but its not?

indicates a blocked radiator
The fix is a new radiator
no-- it is not a problem thermostat as the top hose will not get hot if the water is not flowing through the thermostat
yes the bottom hose will get hot but will always be 10-15 degrees cooler than the top hose because the water is being cooled down by the heat exchange from the fins of the radiator
If you switch the engine off the the bottom hose will get hotter to equal the top hose as there is no water circulation from the pump

Disconnect the top radiator hose at the radiator, plug the hole in the radiator where the hose attaches, and put a garden hose in the radiator to keep it full of water.
Start the engine, and if the water pump is working, the water & coolant will pour out of the top hose.
Remember, the thermostat must already be open, or it will not flow until the thermostat gets hot enough to open.
(Or, if the pump is leaking whilst the car is running, or if the pump is "screaming" whilst the engine is running.)

sounds like the thermostat may not be opening.

Sounds like the heater core is stopped up or bypass hose is

Run the car and check your hoses, Most likely it is the thermostat sticking closed and not allowing water to flow back to the radiator if your top hose is not hot and you can squeeze it then it is your thermostat.

air pocket in block find heater hose take off either end pour antifreeze in radiator until runs out of hose or block with motor not running then put hose back on

P0171....System too Lean (Bank 1)

P0116....Engine Coolant Temperature Circuit Range/Performance Problem

right it means you have a faulty O2 sensor and i would imagine the one after the cat ,and the engine is running cold so its either a problem with no thermostat fitted or outside ambient temperature too cold and you will need to put a piece of cardboard in front of radiator to stop the air flow and the wind chill factor

1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

it may be a little off, but the lower water hose seldom gets very hot,, as its this hose that suplyes the engine with ""cold water"" the hot water comes out the top hose,, drains down the rad and cools on the way down then enters the engine through the bottom hose """if your engine stayes running in the normal place on the gage,,,and not over heating""" why are you spending money for nothing???""
you wont get the bottom hose to run hot unless the engine is cooking

it is most likely your heater core