Took to indepedent shop,ran test,stated probably the catalytic converter...and maybe an induction service could solve the problem,but unfortunately he couldn't do it and recommended a dealer. The problem he said would be the dealer would rather sell a converter than do an induction service. $$$$ Is there an alternative route?
emissions light on !! on 2002 Honda Civic Si
by rsm186 in Ruckersville, VA on May 18, 2010
ANSWER by mastertech6371 , May 18, 2010
not really. it is a 420 code for cat efficiency. aftermarket converters are not reccomended as they do not meet oem specs and the light will come on again. replace with oem converter, it is expensive but will do the job correctly. Roy