CEL help P0430
06-24-08, 10:09 AM
#5
iModerate
P0430 - Catalyst System Efficiency Below Threshold (BANK2)
This could be a bad Cat or bad O2 sensors. Its cheaper to start with O2's if your looking to fix it fast without having it tested and diagnosed.
If you have access to the right tools and know how you can test the O2's by viewing their waveforms. Sensor 2 should switch slower than sensor 1 if the Cat is working properly. If they switch at about the same speed the Cat is probably shot. Let us know what you come up with.
Some informative pictures can be found here too.
https://www.clublexus.com/forums/sho...d.php?t=352099
This could be a bad Cat or bad O2 sensors. Its cheaper to start with O2's if your looking to fix it fast without having it tested and diagnosed.
If you have access to the right tools and know how you can test the O2's by viewing their waveforms. Sensor 2 should switch slower than sensor 1 if the Cat is working properly. If they switch at about the same speed the Cat is probably shot. Let us know what you come up with.
Some informative pictures can be found here too.
https://www.clublexus.com/forums/sho...d.php?t=352099
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