What Does P0430 Code Mean?
Fault Code Definition
The Bank 2 Catalytic Converter's emissions reducing efficiency has fallen below the minimum allowable threshold. This efficiency is tracked by a monitoring Oxygen Sensor that is mounted near the outlet of the Catalytic Converter.
P0430 Symptoms
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Check Engine Light will illuminate
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In many cases, no abnormal symptoms may be noticed
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In some cases, there may be a noticeable lack of engine power
Common Problems That Trigger the P0430 Code
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Defective Catalytic Converter
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Internal engine damage resulting in high oil consumption and/or a leaking Head Gasket has damaged the Catalytic Converter
Common Misdiagnoses
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Oxygen Sensor(s) are replaced when the real problem is a damaged Catalyst
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Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
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Catalyst is replaced when a misfiring engine is the real problem