one will be your manual control and the other will be for simulating the o2 sensor on the bench this way you will see how this controller will work with . hp tuners wideband problems-aem-wideband-wiringjpg. complete kitjpg. imagejpg . wideband o2 wiring-20150830_074234jpg . help needed please – loose harness wire to aem ems 2-20150523_160702jpg . no wire. modp 1304 01 o aem wideband failsafe gauge 1995 nissan 240sx. img_20150430_104749jpg. aem electronics digital wideband uego afr gauge pn 30-0300 unboxing.