Changing the air filter was the first thing I did. The engine code is not permanent. I have a Bluecurve code reader and it’s not showing an error.
When I kept getting the message I opened the air box again and it was at that point that I saw that the two arms of the air gates that are supposed to articulate with each other in unison were no longer connected and the reason was a small plastic insert that acts to lock the ball joint assembly together had broken.