What P0430 means
Catalyst System Efficiency Below Threshold (Bank 2)
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0430:
| AUDI | Defective Catalytic Converter, Internal engine damage resulting in high oil consumption and or a leaking Head Gasket has damaged the Catalytic Converter |
| BMW | Catalyst System Efficiency Below Threshold |
| FORD | Catalyst System Efficiency Below Threshold (Bank 2) |
| HONDA | Front Bank Catalyst System Efficiency Below Threshold (Bank 2) |
| MITSUBISHI | Catalyst System Efficiency Below Threshold (Bank 2); Catalyst deterioration 2 |
| NISSAN | Catalyst System Efficiency Below Threshold (Bank 2) |
| VOLKSWAGEN | Catalyst System Low Efficiency Bank 2 |
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