What are the causes of a faulty oxygen sensor?
2 Answers
Oxygen sensors may fail due to blockage by carbon particles or obstruction of the air passage between the sensor and the atmosphere by dust and engine oil. Below is additional information about oxygen sensors: 1. Classification: (1) Titanium oxide oxygen sensors utilize the property of titanium dioxide material whose resistance changes with the oxygen content in exhaust gases, hence also known as resistive oxygen sensors. (2) Zirconia oxygen sensors have zirconia ceramic tubes (solid electrolyte) as their basic components, also called zirconia tubes. 2. Function: They measure whether there is excess oxygen in engine exhaust after combustion, convert the oxygen content into voltage signals transmitted to the engine computer, enabling the engine to achieve closed-loop control targeting the excess air factor. This ensures that the three-way catalytic converter maximizes the conversion efficiency for hydrocarbons, carbon monoxide, and nitrogen oxides in the exhaust, optimizing the conversion and purification of emission pollutants.
I've encountered several instances where the oxygen sensor malfunctioned. This component is primarily used to monitor the oxygen levels in the car's exhaust, ensuring that the fuel burns cleanly. Common causes include prolonged exposure to high temperatures, such as excessive heat in the engine compartment, which can lead to sensor aging and damage; the use of low-quality fuel or additives, where carbon buildup can clog the sensor and cause it to fail; circuit issues are also not uncommon, where damaged wires, short circuits, or poor connections can prevent the sensor from receiving signals. Additionally, owners might neglect maintenance, allowing dirt to accumulate, or the car might suffer physical damage from collisions. The worst part is that a faulty sensor can lead to a sharp increase in fuel consumption, engine shaking, and even excessive exhaust emissions, which is harmful to the environment and a waste of money. If symptoms like sudden spikes in fuel consumption or rough driving are noticed, it's best to seek professional inspection and repair immediately—don't delay. Regular use of high-quality fuel and periodic engine cleaning can effectively extend the sensor's lifespan.
