P0420 Ford -

Question

what is a P0420 code refering to bank 1 on a 1998 ford crown victoria

Answer 1

HI there,

This code is reffering to a bad catalytic converter on bank 1. It's not cleaning the exhaust gases as it should so the rear O2 sensor reports it, and the code appears. Most often a new converter must be installed to resolve the issue.