My CEL came on in my '96 SE and the code also came up "PO420". The dealer is not sure what this is and wants to spend about 3 hours to check the O2 sensors. According to Ford however, the O2 sensors should NOT be replaced with a PO420 code.
I have 79,500 miles on my car. Does anyone know if the catalytic converters for a '96 are federally warranted for 7K or 8K. My drivers manual leaves me confused and the dealer thinks its only 5K.
Also, does anyone know if the pre-cats are covered under the extended federal emissions warranty?
