What does code P0430 mean on a BMW and is it safe to drive?
P0430: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means on your BMW, what usually causes it, what repairs typically cost, and how safe it is 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 for your BMW
- 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 BMW, repairs for P0430 often fall between $400 and $2400, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on BMW
BMW P0430 on N52/N54/N55 engines mirrors P0420 on the bank 2 catalyst. Both catalysts typically degrade together; if P0420 and P0430 appear simultaneously, budget for both converters.
Most commonly affected models
3 Series 2006–20125 Series 2008–2013X5 2007–2013