1997 honda civic 100040 mileages.
my check engine light was on. The diagnostic trouble code is P0420 Catalyst System Efficiency Below Threshold (Bank 1), one repair technician told me I should replace a new catalyst converter, but another one told me to replace the new O2 sensors, what should I do? Thanks.
have the same problem?
Sunday, August 13th, 2006 AT 11:59 PM