Passat B5 1.8T exhaust pipe emits black smoke, resulting in high fuel consumption. Is there something wrong with the oxygen sensor?

Passat B5 1.8T exhaust pipe emits black smoke, which leads to high fuel consumption, indicating insufficient combustion and poor mixing ratio. In addition to the poor operation of oxygen sensor, intake system problems (such as throttle valve, air flow meter and intake manifold pressure sensor), spark plug ablation and cylinder pipeline leakage are also important reasons.

Oxygen sensor: Oxygen sensor is the standard equipment of automobile. It is a measuring element that uses ceramic sensitive elements to measure the oxygen potential in the automobile exhaust pipe and calculate the corresponding oxygen concentration according to the principle of chemical balance, so as to monitor and control the combustion air-fuel ratio and ensure the product quality and exhaust emission to meet the standard. Oxygen sensors are widely used in the atmosphere control of various coal-fired, oil-fired and gas-fired kilns. It is the best way to measure the combustion atmosphere, and has the advantages of simple structure, quick response, easy maintenance, convenient use and accurate measurement. Using this sensor to measure and control the combustion atmosphere can not only stabilize and improve the product quality, but also shorten the production cycle and save energy.