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The OBDII sytem requires the post Cat O2 sensors (there are 4 sensors in total; one pre & post on each bank) - ECM won't work properly without the cats in place.Besides it will stink ............. <!--StartFragment -->
The OBDII sytem requires the post Cat O2 sensors (there are 4 sensors in total; one pre & post on each bank) - ECM won't work properly without the cats in place.
Besides it will stink ............. <!--StartFragment -->
