What needs to be replaced for P0430 trouble code?

1 Answers
Corey
07/30/25 2:18am
P0430 trouble code indicates that the catalytic converter system efficiency is below threshold (Bank 2). Here is the expanded content: 1. Possible causes include exhaust gas leakage near the exhaust pipe or manifold, catalytic converter failure, engine coolant temperature (ECT) sensor malfunction, engine misfire or timing lag, excessively dirty engine oil, oxygen sensor failure, or excessively high fuel system pressure. 2. After troubleshooting the vehicle, the trouble code needs to be cleared. 3. When clearing the trouble code, it must be done strictly according to the specified method for the particular vehicle model. Simply disconnecting the battery negative ground cable to clear the code is not recommended.
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