Human: How can I tell if my car has a faulty engine? Assistant: 
The first step to take is to have your car checked by a qualified mechanic. They will be able to assess the condition of the engine and let you know if there are any signs of trouble. You may also want to look for warning lights on your dashboard, as this could indicate an issue with the engine. If the problem persists or gets worse over time, it's best to take your car to a mechanic for further inspection.