Common failures of oxygen sensors
What are the performances of the oxygen sensor failure? How do you know?
The next is the performance of the oxygen sensor failure.
1.Oxygen sensor poisoning
3.Oxygen sensor ceramics shatter
4.Heater resistance wire is burnt off
5.The internal wiring of the oxygen sensor is disconnected
6.Oxygen sensor appearance color inspection.
The oxygen sensor has a characteristic that its output voltage is abrupt near the theoretical air-
fuel ratio (14.7:1). This property is used to detect the concentration of oxygen in the exhaust and
feed it back to the computer to control the air/fuel ratio. When the actual air-fuel ratio becomes
higher, the concentration of oxygen in the exhaust gas increases and the oxygen sensor notifies
the ECU of the state in which the mixed gas is lean (small electromotive force: 0 volt). When the
air-fuel ratio is lower than the stoichiometric air-fuel ratio, the concentration of oxygen in the
exhaust gas is lowered, and the state of the oxygen sensor (large electromotive force: 1 volt) is
notified to the (ECU) computer.