p0430
Moderate
Lexus · SUVs
Catalyst System Efficiency Below Threshold (Bank 2)
Quick Answer
Error code P0430 on your Lexus 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
Connect diagnostic scanner and identify pattern
2
Inspect catalytic converter condition
3
Test oxygen sensor output voltages
4
Check exhaust system integrity
5
Verify fuel trim values are normal
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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