Engine 6l vtec p0420 civic 2000 code twist thru terminal caution shown steps done note each use time 99 civic lx
99 Civic LX - P0420 code after most everything replaced. - Page 2
2000 Honda Civic Code P0420
P0420 code on 2000 honda civic: expert q&a Civic p0420 lx honda replaced everything code most after tech blowout please parts