2015 Mercedes-Benz P0430: What It Means & Is It Safe to Drive?
P0430 on the 2015 Mercedes-Benz: 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 2015 Mercedes-Benz
- 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 2015 Mercedes-Benz, repairs for P0430 typically fall between $400 and $2400, depending on the root cause and labor rates in your area.
Known issues on Mercedes-Benz
Mercedes P0430 on M272 V6 and M273 V8 engines targets the bank 2 (passenger-side) catalyst. Both catalysts typically degrade at similar rates; if P0420 and P0430 appear together, test the rear O2 sensors first before budgeting for both converters.
Most commonly affected models
E350/E500 2007–2013ML350/ML500 2006–2011S550 2007–2013