You should use mass air flow sensor cleaner or throttle body cleaner, both of these typically won't affect electrical circuits, carb cleaner can harm wiring and varnish dipped windings, they also won't harm O2 sensors. most of the older carb cleaners will damage o2 sensors... A couple of carb cleaner sprays out now say safe for o2 and suitable for throttle body, you just have to look at the can first.