So I don't think these two things are related, but shortly after I swapped my plugs to iridium one-step-colder spark plugs I got a Check Engine light. When I check my Accessport for the codes, it says P040B. which when searched it comes up as a exhaust recirc temp sensor malfunction. Anybody have this issue before and taken care of it? Is it a normal issue or would it be caused by mods? I'm Stage 3 COBB. Also I have cleared the codes and reset ECU learning a couple of times but it keeps coming back up. Car is operating normally but the CEL stays on. Car is at Dealer for a drivetrain warranty issue right now so I wonder if I should ask them to check it or naw. Anyone have thoughts? Much appreciated.