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Old 01-09-2012, 11:40 AM
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Default Catalytic converter Oxygen sensor bank2 PO430

Hello Chevy Fam, I recently had my engine light checked out and the code that the computer came up with was: PO430, Catalytic Converter Oxygen sensor bank 2.

I wanted to know is this something I can do myself or I need to take my truck in for servicing
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Old 01-09-2012, 02:48 PM
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This may give you some answers.OBD-II Trouble Code: P0430 Catalyst Efficiency Below Threshold (Bank 2)
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Old 01-24-2012, 04:09 PM
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Thanks that was some good info, but I need to now how to check the sensors and witch side of the engine is bank 2 I have a Vortec 5.3 2008 Silverado
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Old 01-24-2012, 06:40 PM
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Bank 2 is the passengers side. That code would be for the one after the Cat. You need to test it with a mulimeter or scan tool. Here's the readings
------------------Idle -----------Full Rich/Lean
Front -----------0.2-0.8 V -----R-0.9/L-0.1 V
After Catalyst -0.4-0.8 V -----Cruise-0.4-0.8 V
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Old 01-24-2012, 08:40 PM
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You need to replace the converter 99% of the time the cat is bad. The code po430 does not say anything about o2 sensor. The correct code definition is catalyst efficiency below threshold bank 2. How many miles are on the truck. The converters are covered under the federal emissions warranty 8 years or 80,000 miles. It is mandated by the federal government the dealer can not refuse unless you have modified the exhaust or the engine.
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Old 03-14-2015, 02:37 PM
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Default Bank 2 Catalytic Converter Chevy Traverse P0430

Quote:
Originally Posted by MDTAHOE View Post
You need to replace the converter 99% of the time the cat is bad. The code po430 does not say anything about o2 sensor. The correct code definition is catalyst efficiency below threshold bank 2. How many miles are on the truck. The converters are covered under the federal emissions warranty 8 years or 80,000 miles. It is mandated by the federal government the dealer can not refuse unless you have modified the exhaust or the engine.


Which catalytic converter is Bank 2? Is Bank 2 the one in front of the engine or the one under the passenger side of the vehicle?
Thanks, JT
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