I just had a CEL and it turned out to be the flange Supply. Of course, the issue arrises the day before I was planning on taking my car in for the required emissions test. I waited a week (hardly drove the car) and now my car is showing not ready. I need to give enough time for the sensors to record enough data before retesting......Anyone know how long is takes (how many miles) on an '07 911? The dealership told to drive a couple of hours in the car and before COVID it might have not been too difficult.......

 

You won’t need a couple hours. Idle the car for a few minutes. Then do 5 minutes or so of driving at ~30mph, 10 minutes or so between 45mph and 55mph and you should get everything to reset. Also make sure you have over 3/4 tank of fuel. And don’t use full throttle.
I have a loop I run that sets every for me in about 15 miles.

 

that senerio works very well for the reset, I have a 05 and radomely get the CEL for the P301 - 306 codes. Three shops and $$$$$$$ have tried to figure it out. So now I carry a OBD code reader and clear them.. when is time for smog here in Kalforkia. I clear the history make the run to add the history and start over..............