What Causes Yellow Smoke from the Exhaust Pipe?

[Chloe]

Yellow smoke from the exhaust pipe is caused by a malfunctioning catalytic converter or poor fuel quality. Owners can take their vehicles to a 4S shop for repairs. Car smoke can be categorized into blue smoke, black smoke, white smoke, and yellow smoke: 1. Blue smoke from the exhaust indicates that the vehicle is burning engine oil. Check the oil level yourself; if you notice a significant drop, seek repairs promptly. 2. Black smoke from the exhaust means incomplete combustion of fuel in the engine cylinders. 3. White smoke from the exhaust is caused by a damaged seal in the engine's coolant circulation channel or a cracked engine cylinder liner, allowing coolant to enter the cylinder.