What are the symptoms of an oxygen sensor failure?

[Elena]

Symptoms of oxygen sensor failure include: unstable idling, excessive fuel consumption, engine power loss due to sensor damage, sluggish acceleration, misfires, and black smoke from the exhaust. Once the oxygen sensor fails, the computer of the electronic fuel injection system cannot obtain information about the oxygen concentration in the exhaust pipe, thus unable to perform feedback control on the air-fuel ratio. This leads to increased engine fuel consumption and exhaust pollution. The oxygen sensor is a standard component in automobiles, which uses ceramic sensitive elements to measure the oxygen potential in the vehicle's exhaust pipe. It calculates the corresponding oxygen concentration based on the chemical equilibrium principle, achieving the monitoring and control of the combustion air-fuel ratio to ensure product quality and compliance with exhaust emission standards.