PennDOT can suspend the license plate on your vehicle for many reasons. Dropping or changing insurance is the most common reason. Once your license plate is suspended, you must return it to PennDOT. If you continue to operate your vehicle after being notified of the suspension, you face the consequences as set forth in PA Vehicle Code Section 1371.
§ 1371. Operation following suspension of registration.
(a) General rule.–No person shall operate and no owner shall permit to be operated upon any highway a vehicle the registration of which has been suspended.
(b) Penalty.–Any person violating this section is guilty of a summary offense and shall, upon conviction, be sentenced to pay a fine of not less than $100 nor more than $500. In the case of a motor carrier vehicle other than a trailer, the fine shall be double the registration fee for the maximum weight at which the vehicle could have been registered in this Commonwealth.