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Discussion Starter #1
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.
 

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Discussion Starter #2
It may actually be P0408, another site is calling that the "P0408 EGR Sensor B Circuit High Input" code
Not sure what EGR sensor is.
 

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EGR stands for Exhaust Gas Recirculation. I have been hearing alot of intake flow noise since this code popped up. Going to check my BOV and make sure it's tight.
 
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