Had a 2001 E350 that failed NY State Inspection due to incomplete O2 and O2 heater monitors. I hooked up the Snappy Generic to view the monitor screen. Showed ... Catalyst-N/A... Evap-N/A...EGR-N/A...Heated Catalyst-N/A...O2-Not Ready... O2 Heater-Not Ready. A... Login to read more.