Final answer:
There are no punctuation errors in the sentence, correctly punctuated with a semicolon and exclamation mark.
Step-by-step explanation:
There are no punctuation errors in the sentence, "Your teachers or principal are coming soon; time is running out!" The sentence is correctly punctuated with the use of a semicolon (;) to separate two closely related independent clauses, and an exclamation mark (!) at the end to show strong emotion or emphasis.
Learn more about Punctuation in English sentences