cummlns

BBk shorty headers
magnaflow high flow cats and Y pipe
SLP catback.

Put everything together and SES light came on with those two codes. The car also has a funky smell coming from exhaust, maybe lean? not sure but since lean code is on, makes me worried.

Other than the headers and exhaust mods, only other mod is slp intake.

Does this sound like a tuning issue or maybe an exhaust leak is causing these codes?

Thanks for any input.