P0420 and p0420 p

Question

I have a fiesta 2006 what's the p stand for

Answer 1

P0420 Catalytic below threshold Bank 1

The "P" at the end of a DTC code represent that this code is pending or not fully mature. So code condition would take at least to ignition start before the code become mature, once matured the CK ENG LT is turned on