Start the car and it starts freaking out. Plug it into VIDA and get ECM 919A. Clear it, it stops hunting, drive it 20 miles with reduced engine performance still on but no CEL. Scan it when I turn it off and only ECM 91B7 is there. The only thing I have done recently is change the oil, and add a GROM last night... Maybe I ran the interior lights a little long last night and the car isn't happy... Otherwise from casual googleing it's the ETM which was replaced 60k ago.