catalyst efficiency

How Do You Fix P0420 Catalyst System Efficiency Below Threshold Bank 1?

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How Do You Fix P0420 Catalyst System Efficiency Below Threshold Bank 1? Replace muffler or repair leaks in the muffler. Replace exhaust manifold or repair leaks in the exhaust manifold. Replace exhaust pipe or repair exhaust pipe leaks. Replace catalytic converter (most common) Replace engine coolant temperature sensor. Replace front or rear oxygen sensor. What

How Do I Fix Error Code P0430?

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How Do I Fix Error Code P0430? Replacing the catalytic converter. Diagnosing and repairing the engine misfire. Replacing the fuel injector. Repairing any mechanical damages in the engine. Replacing the oxygen sensor. Repairing or replacing the exhaust replaced. How do you fix catalyst efficiency below threshold? Replace muffler or repair leaks in the muffler. Replace