if we're taking about the aeroforce interceptor scangauge these answers are incorrect, the scangauge can indeed monitor all 3. it even has the annunciator function that will blink the leds when the parameter it is set to is exceeded; i have it warn when knock retard goes off. appearance wise it is imo much nicer than the ugly and bulky dashhawk, and can be easily mounted in the vent and other standard pods.