Does a Chrysler Pt cruiser have zero tolerance engine?

No, a Chrysler PT Cruiser does not have a "zero tolerance" engine. The term "zero tolerance" isn't a standard automotive engineering term referring to a specific engine type or design. It's possible you've encountered this term in a specific context (perhaps a repair manual or forum discussion) that's using it informally. It might be referring to something like a very low tolerance for wear or contamination, but it's not a common or official descriptor for any car engine.