I tried to loan a fuel pressure tester and vacuum at the parts store but they don't. At the shop they wanted to charge 95 dollars just to do the test.

I got a professional multimeter and OBD II scan tool.

Can I check if the fuel pump is defective using a meter?

The fuel pressure regulator and charcoal canister could be at fault (according to some websites).

Since both are emission components can i check if these are bad using an OBD II scanner?

Can I read the codes without turning the key to the ON position?

Advice please.