What Causes Excessive Carbon Monoxide in Vehicle Exhaust?

[LaBenjamin]

Excessive carbon monoxide in vehicle exhaust can be caused by sensor failure, clogged catalytic converter, or excessive carbon deposits. The details are as follows: Sensor Failure: Malfunction of sensors that control and stabilize the air-fuel ratio can lead to excessive fuel injection, resulting in insufficient air supply. This causes incomplete combustion of gasoline, increasing carbon monoxide levels in the exhaust. Clogged or Dirty Catalytic Converter: A clogged or dirty catalytic converter loses its ability to convert carbon monoxide, requiring cleaning or replacement. Excessive Carbon Deposits: Removing carbon deposits ensures complete fuel combustion and prevents carbon buildup in the engine, significantly reducing carbon monoxide in the vehicle exhaust.