Hi, what the code is telling is that you need to get the temperature senor replaced doing this should also solve your ac problem due to the face that without the temp sensor working the ac wont know how hot the engine is to set the correct temp for the ac so changing the temp sensor should solve the ac problem as well.

If how ever the temp sensor dont fix the ac then the chances are your ac just needs re-gassing and this can be done by any garage for a small fee.

Let me know how you get on or if you need further assistance ok