P0430 2002 Ford F150 -

Question

The code came on used my scanner and what do I do to fix this problem do I need a new catalyst converter or just another o2 sensor

Answer 1

P0420 catalytst below efficiency

Check for tune up, and do a MAF cleaning, even if you replace the catalytic you need the engine to have a clean bill of health , Catalytic do degrade from use and time , and some times poor maintance can result in a catalytic code condition,