P0430
Catalyst System Efficiency Below Threshold Bank 2
Generic code
Auxiliary Emissions Control
Medium severity
Moderate repair
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What P0430 means
- The OBD-II fault code P0430 indicates that the Catalyst System Efficiency is below the threshold for Bank 2. This can cause the vehicle to fail emissions tests, have decreased fuel efficiency, and may result in a reduction in engine performance.
Possible symptoms
- Illuminated check engine light
- Decreased fuel efficiency
- Failed emissions test
- Reduced engine performance or power
Possible causes
- Failed catalytic converter
- Malfunctioning oxygen sensor(s)
- Faulty exhaust manifold gasket(s)
- Leaking exhaust system
- Engine misfire or running too rich
- Failed engine control module (ECM)
Related parts
- Catalytic Converter: A catalytic converter is a device that converts toxic gases and pollutants to less harmful pollutants. Problems lead to harmful emissions out of limit, rotten egg smell from exhaust & reduced speed
Possible solutions
- Replace the catalytic converter
- Replace any faulty oxygen sensors
- Replace damaged exhaust manifold gaskets
- Repair any leaks in the exhaust system
- Repair any engine misfire or rich fuel condition
- Replace the engine control module (ECM) if necessary
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P0430 on OBD DashX
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