under what condition does the computer check the EVAP System Monitor

Question

I have driven this car about 25 miles after erasing codes. The evap system monitor has not been checked by the computer yet. Under what driving conditions does the ecm test the evap system

Answer 1

The Evap system is monitored after the heated 02 sensor monitor runs. . It will run on the 2nd drive trip, which means you will need to let the vehicle go from another cold start..Also your fuel tank needs to be between 1/4 to 3/4.