Originally Posted by scirocco16v

The concern you're describing is the emissions system self test. The XF will self-test under certain parameters to verify all emissions systems are compliant. Those being: Catalyst, Oxygen sensor, Heater for Oxygen sensor, Evaporative Emissions control, EGR, secondary air injection, heated catalyst (our cars don't have), and Misfire. You will need to complete multiple drive cycles for all the "monitors" to perform self tests. The one particular exception though is the Evaporative emissions, you'll need to have generally between 1/4 and 3/4 of a tank as the system will not run the test with too much or too little fuel. Simply, the car needs to be driven more...being brought up to operating temp each time.