OBD code P0430

[cyrusyn]

I'm getting OBD2 code P0430 (Catalyst Efficiency below threshhold. bank 2.)
I am thinking that this has to do with O2 sensor. Do you think I am correct on this?

I am also wondering where this 02 sensor is located. Acccording OBD2 manual, this is a engine bank 2 O2 sensor. But there are two O2 sensors on a cat on that bank; one in the front of the cat and one in the behind. Which O2 sensor do you think I should change?

[jjh1976]

it sounds like you have a bad catalyst. if it was the 02 sensor it will tell you bank 1 or 2 and upstream or downstream. so id look at the catalytic converter

[shorod]

According to the factory service manual, the following are the potential causes of a P0430

• Use of leaded fuel
• Damaged HO2S
• Malfunctioning ECT
• High fuel pressure
• Damaged exhaust manifold
• Damaged catalytic converter
• Oil contamination ù Cylinder misfiring
• Downstream HO2S wires improperly connected
• Damaged exhaust system pipe
• Damaged muffler/tailpipe assembly
• Retarded spark timing

-Rod