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I posted this in the Scan/Tune section as well but this section seems to get better response!
I did some research and found that it means:
H02S Circuit Insufficiency Activity Bank 2 Sensor 2
1. Which side is bank 2, RH or LH?
2. Which sensor is sensor 2? The ones in the exhaust manifold or the ones behind the cat(s)?
3. I assume this means that the O2 sensors are bad? Is this correct?
4. Should I replace all 4 (I assume 1 in each manifold and 1 behind each cat) O2 sensors?