I have 2 1997 Lincoln mark viii 1 with 225,000 one with 190,000 both work great but one the obd2 code P0411 keeps coming up I can clear it it will stay off for a short time then comes back on. do you know what could be the issue? I have swapped some of the suggested parts between them but no luck
Hope this helps:
https://www.700r4transmissionhq.com/p0411-lincoln-continental/
try having the air pump changed