How does a multimeter detect oxygen sensor failure
For the method of using a multimeter to detect the fault of the oxygen sensor, use the engine speed to run at 2500r/min for about 90s, and use the multimeter to measure the voltage of the signal output terminal of the oxygen sensor. Let's take a look at the normal value range of this voltage.
How to detect the fault of oxygen sensor with multimeter
Make the oxygen sensor work, that is, make m at a temperature above 4oor.
Use the engine speed to run at 2500r/min for about 90s, and use a multimeter to measure the voltage of the signal output terminal of the oxygen sensor. The normal value of the voltage should be:
1. When the engine exhaust gas is rich, the output voltage of the oxygen sensor is 0.9/1V.
2. When the engine exhaust gas is lean, the output voltage of the oxygen sensor is 0/0.IV.
3. When the working temperature of the oxygen sensor is lower than 360°C, the oxygen sensor is in an open circuit state and no signal is output.
