I wonder if it would have been possible without installing the new actuators. When I first put mine on and triggered relearns/cleared several times, it didn't do anything. I ignored the CEL, and then it went away for a few days. Then it came back. I'm glad yours went away, lol. I think new actuators and ignoring it might be the fix for me.
Dropping it off at Cadillac next week for "Service Brakes Worn" spamming my dash when I hit the gas. The car only has 11,600 miles, so I don't need new brakes. We'll see if they mention the exhaust.
