p0430
Moderate
Porsche · SUVs
Catalyst System Efficiency Below Threshold (Bank 2)
Quick Answer
Error code P0430 on your Porsche SUVs means: Catalyst System Efficiency Below Threshold (Bank 2). This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Verify bank 2 oxygen sensor operation
2
Test catalytic converter efficiency
3
Inspect exhaust pipes for damage
4
Check engine fuel trim values
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Catalytic converter
Oxygen sensor
Exhaust clamps
Related Error Codes