What does code P0430 mean on a Ford and is it safe to drive?
P0430: Catalyst System Efficiency Below Threshold (Bank 2). Here's what it means on your Ford, 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 Ford
- 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 Ford, 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 Ford
Ford P0430 on V8 models mirrors P0420 but on the passenger-side exhaust bank. On 5.4L F-150, exhaust manifold cracks are equally common on both banks—inspect both when diagnosing.
Most commonly affected models
F-150 V8 2004–2010Explorer 4.0L/4.6L 2002–2008Mustang GT 2005–2010