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Can this code be broken down further to see exactly what sensor is bad before replacing the Cat?

That's a $600 Job

Vehicle: 06 Sienna

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Hi there,

You need a scan tool that can see the active data from the bank2 rear O2 sensor. When the converter is working properly it has a different pattern on the sensor then when it's not working properly. This is how we verify the converter is the problem and not just a faulty rear O2 sensor.

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