R134a
r12
you take it off
I find the best way is to take it to a Honda dealer but Canadian tire will do in a pinch
A wiper arm on a 2001 Honda Civic is screwed on. To remove it unscrew the mounting hardware and take off the wiper arm.
TAke it to the garage as they have check out charts.
It means you need to take it to a service station and have someone to do a diagnostic.
In my experience with modern cars you don't. The mechanics set it and it will be reset when you take it in.
Take it to a Honda Civic garage / mechanic.
Freon should be R134a.
I am not entirely sure about the 2004, but in a 2001 Civic DX it is located behind the front bumper on the driver's side. You have to take the bumper off to get at it.
Honestly, if you have to ask, maybe you should take it to the dealer. Or a really nice mechanic.
Where is the starter on a 1997 Honda Civic?