I have an '11 F150 Lariat. So I thought this would be the place to post this. For the past few days I've been trying to look up this information by searching the forums. Yes, I did find it in my Owners Manual. But sometimes others do have suggestions on cures for problems. The battery was replaced in the truck last week. Now I need to get the truck inspected for the first time, and I've run into this problem. I've been having an issue getting my truck thru emissions testing because of the "Readiness" or lack there of, in the OBD-II system. The information isn't contained in one spot on the forums, but it is jumble up in several areas. So I thought I would post specifically what it says in my Owners Manual. Maybe it will help someone else out.
This is from the Owners Manual for an '11 F150:

"Readiness for Inspection/Maintenance (I/M) testing"
Some state/provincial and local governments may have
Inspection/Maintenance (I/M) programs to inspect the emission control
equipment on your vehicle. Failure to pass this inspection could prevent
you from getting a vehicle registration. Your vehicle may not pass the I/M
test if the service engine soon indicator is on or not working
properly (bulb is burned out), or if the OBD-II system has determined
that some of the emission control systems have not been properly
checked. In this case, the vehicle is considered not ready for I/M testing.
If the service engine soon indicator is on or the bulb does not
work, the vehicle may need to be serviced. Refer to On-board
diagnostics (OBD-II) in this chapter.

If the vehicle’s engine or transmission has just been serviced, or the
battery has recently run down or been replaced, the OBD-II system may
indicate that the vehicle is not ready for I/M testing. To determine if the
vehicle is ready for I/M testing, turn the ignition key to the on position
for 15 seconds without cranking the engine. If the service engine
soon indicator blinks eight times, it means that the vehicle is not
ready for I/M testing; if the service engine soon indicator stays on
solid, it means that the vehicle is ready for I/M testing.
The OBD-II system is designed to check the emission control system
during normal driving. A complete check may take several days. If the
vehicle is not ready for I/M testing, the following driving cycle consisting
of mixed city and highway driving may be performed:

15 minutes of steady driving on an expressway/highway followed by
20 minutes of stop-and-go driving with at least four 30-second idle
periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete. If
the vehicle is still not ready for I/M testing, the above driving cycle will
have to be repeated.

 

You might want to add that you have to have between 1/4 and 3/4 tank of gas. Or the EVAP won't test.