OBD II monitor cycle

[Comin' in Hot]

How long does it take to complete the monitor cycle for all monitors? I have driven about 270 miles and I still have two incomplete. The Evap and one other I can't remember. I thought it was supposed to be like 100 miles?

[Comin' in Hot]

The other monitor that need to cycle yet is the catalyst monitor.

I also just found this

http://www.obdii.com/drivecycleford.html

[EMAS]

I've never had to drive that far to get it to complete it's cycle. My son's Taurus likes to throw a EGR code from time to time, usually just before it's time for the test. It usually only takes about 5-6mi before they all show complete w/o doing any particular type of driving other than taking it on the freeway after it is up to temp.

The EVAP does need ambient temp in a certain range, but even then if there are multiple trip cycles in that temp range it should show complete.

[larryo340]

At work I've found that to help set EVAP quicker...what seems to work almost every time is to have between a quarter and three quarter tank of gas, and leave it parked for at least an eight hour parked period without starting the engine. Then take it out for a moderate drive without shutting it off. Having a OBD scanner plugged while driving that has the capabilities to show monitor status helps.

The cat monitor needs some mixed driving ending with highway miles not exceeding 55-60 MPH. Some cars set the cat monitor within a 20-30 minute drive, but some take a lot longer for reasons unknown.


I've also seen some cars respond well to clearing the OBD while driving in the highway after 10-15 minutes of driving.