2006 Lexus P0430: What It Means & Is It Safe to Drive?
P0430 on the 2006 Lexus: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
Same as P0420 but for bank 2. The catalytic converter on bank 2 is not operating efficiently.
Common causes on the 2006 Lexus
- Failed catalytic converter (bank 2)
- Faulty O2 sensor(s)
- Exhaust leak
Symptoms
- Check Engine Light
- May fail emissions
Typical fixes
- Replace bank 2 catalytic converter
- Replace oxygen sensors
- Repair exhaust leaks
Repair cost range
For a 2006 Lexus, repairs for P0430 typically fall between $400 and $2400, depending on the root cause and labor rates in your area.
Known issues on Lexus
Lexus P0430 on V6/V8 engines targets the bank 2 catalyst. The same downstream O2 sensor failures that cause false P0420 on bank 1 apply here; test sensor function before condemning the converter.
Most commonly affected models
ES330 2004–2006RX330 2004–2006GX470 2003–2009