CEL P0430 - what is it?

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 Gas leakage on exhaust system
 Three way catalytic convertor
 Open or short in heated oxygen sensor circuit
 Heated oxygen sensor

Is that the only code you are getting? Sounds like maybe a bad o2 sensor.
 
P0430 Catalyst Efficiency below threshold - Bank 2

Above is the code that I have with my check engine light - anybody know what it means? Thanks in advance and Happy Holidays!

Amando :popcorn:

amando, it is usually either the cat or the rear o2 sensor causing the problem. 430 should be the rh side. need to check o2 sensor activity with scan tool or similar. This code usually means that the front and rear sensors have matching signals. front should cycle and rear should not.
 
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