Is there something wrong with my car's exhaust?

Is there blue smoke coming out of your tailpipe?

Is the smoke white?

White smoke coming from your exhaust pipe is indicative of your engine burning either coolant or transmission fluid. Does the smoke smell sweet?

Is the smoke black?

If there is blue smoke coming out of your tailpipe, that means that your engine is burning oil. The usual suspects here are worn out valve seals or gaskets. However, in serious cases, the smoke might be coming from worn out or deteriorated piston rings or cylinders. You need to have this checked out as there is a huge risk of serious engine damage.

If the smell of the smoke is a bit sweet, it is burning engine coolant, and it might be due to a cracked cylinder head or a leaking head gasket, both serious problems that you need to have professionally fixed.

If the smoke smells like burnt oil, the culprit is burning transmission fluid, which might have gotten sucked through a vacuum hose attached to the transmission. Both scenarios mean big trouble for your car's engine, which means you need to bring your car to the garage immediately.

Black smoke in gasoline engines is a sign that the engine is receiving a rich fuel mixture, in other words, the engine is getting too much fuel and not enough air. Usually, in electronic fuel injected cars, the problem might be caused by leaking fuel injectors, a stuck fuel pressure regulator, or other problems. It is best that you bring your car to the garage and let them figure out what exactly is the reason so they can repair it.