Everyone is always on the lookout for the dreaded “check engine” light. Of course, this light doesn’t necessarily mean that the issue lies with your engine (a loose gas cap can trigger this light), but you should always take this sighting seriously. Because your engine is such an important component of your vehicle, it’s a good idea to be aware of signs that may indicate that you are having engine troubles.
You should never hear knocking sounds while you’re driving. If you hear this, it is possible that the engine’s bearings have started to fail. Exhaust smoke is another detail to pay attention to. Blue, black, or white smoke are abnormal, each indicating that another component (like gasoline or coolant) is being burned.