Originally posted by COntour:
So today when I was looking in the Haynes Manual it looks like it is before the cat. Is this correct? Also how hard is it to replace the O2 sensor.
Your car has four O2 sensors. Two on each bank. On each bank, there is one before the cat and one after. If you do a search, you will find plenty of threads on O2 replacement.
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
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