OK, thanks for the input. I inherited this DeVille from my dad four years ago and it seems something goes wrong with it every few months.
The AC mode door actuator, (Fixed by info from this site)
The oil pressure sensor, (Fixed by info from this site)
The oil filter adaptor, (Fixed by info from this site, dealer said it was my main seal)
The plenum gasket, (Fixed by info from this site)
The water pump tension pulley, (currently being fixed by info from this site)
The side view mirror going dark, (trip to junk yard $125)
The air bag light intermittently coming on and off, (Fixed by info from this site)
and now the P0741 issue. , (NOT going to be fixed by info from this site) I'll just keep clearing it and save the money. I live in Texas, but not in an area that checks for emissions;
I have a '98 F150 (275k miles) and a 2001 F250 V10 (230k miles) and they rarely have issues. Last GM vehicle I had was an '88 Beretta and it was also nothing but problems.
I do enjoy working on my own vehicles, but also live on a farm and have other things I need to be doing.
I also appreciate all the help I get on this forum. thanks