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Q: I have p0420 code and was wandering where the O2 sensor bank 1 is located at? on 2011 Dodge Grand Caravan

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I have a p0420 code i do not have signs that engine is idling bad or running at lower power and i dont want to replace the catalytic converter if i dont have to
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http://www.autocodes.com/p0420

P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first.

Read more: http://www.autocodes.com/p0420_dodge.html
Hello,
The best thing to do is have it scan tested.
The P0420 code is only saying what fault was recognized, but the sensor should be tested for proper function.
A properly functioning O2 sensor will just let you know when you have an inefficiency, and a bad one will report a false reading.
The expertise comes in when it is time to identify if the readings are correct or not.
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