It is my understanding that all OBD-II vehicles have the 2d O2 sensor, but
the CA, MA, NY emissions requirements are more stringent that federal and
require more equipment.
Beats me, my '92 3.9 got sniffed in June and had 9 ppm hydrocarbons and
0.01% CO max, WELL below the max's. Irritatates me when I see somebody
driving a vehicle around that's obviously never had regular oil changes,
has bad valve seals and rings leaving a smoke trail down the road.
Larry Elliott, '92, 3.9, 4x4, 5sp'd, LE
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