Learn How to Check the O2 Sensor| Toyota Corolla O2 Sensor Diagnosis

O2 Sensor Checkup Tutorial:

1. Turn off your engine
2. Locate your diagnostic connector, and look for terminal “OX1″ and “E1″
3. Get an analog multi meter (any brand can do)
4. Select the 2.5V DC range.
5. Insert the red color probe to “OX1″, and black colour probe to “E1″
6. Place the multi-meter on the windscreen, as near to the driver side as possible
7. Start your engine.
8. Wait till the engine reaches working temperature.
9. Keep your RPM stable at 2500 RPM.
10. 10) Observe you multi meter’s needle. It should be moving up and down, from 0 to 2/5 of full scale.
11. Time your watch, a good O2 sensor will move the needle up and down for at least 8 times every 10 seconds.

If your needle move less than 8 times per 10 sec, or idle at any scale, your O2 sensor is dead. Change it asap..