Technically, no. However, the definition of "probable cause" can cover a very large area, including the officer making a judgment call as to the way the person's driving, a loose license plate or one that is too dirty to be clearly seen, and so on and so forth.
Probable cause is anything an officer wants it to be....whether it would hold up in court? Probably, if they find something else.
yes
Most juridictions allow arrest for a felony without a warrant as long as probable cause for the arrest can be articulated.
Under no circumstances can a police officer stop you or search you without probable cause. Probable cause is one of the ways that an ordinary citizen's right to privacy is protected from unlawful search and seizure.
A computer check is an investigatory tool, no probable cause or reasonable suspicion is necessary.
Until he has sufficient probable cause to sustain a warrant for an arrest.
A police officer must have either your consent, a warrent, or probable cause to search your vehicle - probable cause to search can include everything from a partially hidden weapon (gun), blood, body parts to just the cap of a alcohol container sticking up from a seat.
Yes. but they have to have probably cause to do so.
Yes, they can, as long as they need a probable cause
yes
No more so than they can with a license they MUST have probable cause .
No more so than they can with a license they MUST have probable cause .