Hi Guys, Roy you are right, i have had this code come up before and after a lot of head scratching i re-adapted the AMM and had no further problems. just to confirm i went in to star and checked sure enough you have to initialize the air filter after replacement.
it's getting more crazy every day.

HTH

Kev Gundry

P.S. Peter these vehicles have a 3 year bumper to bumper warranty so depending when it was registered is could still be under warranty.