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Discussion Starter · #1 ·
A 2001 Rav4 with a faulty O2 sensor,Bank2 sensor2, can I check this switch with
> a multimeter to see if it is faulty?
What should the resistance reading be?
And is there a bridging method of reading the fault on the ECU memory,without the use of a external diagnostic unit, like
earlier models in the toyota range, and how is it done?What to watch for while doing this? What price are O2 sensors?

2,420 Posts
O2 sensors are the only sensors on your vehicle that actually produce amps or milliamps as the case may be. I believe they range from 0-.5. They can be tested but I haven't done so. I do know that unless you test them properly, you will destroy them. They cost about $50 to $125 US depending. I just replace them when they have about 50k miles on them.

All my experience is with 8 cylinder GM vechiles. A bank 2 sensor 2 PO code is a passenger post cat sensor. Even if it was bad your vehicle would run just fine. This sensor just tests the functioning of the cat.
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