Exhaust woes
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Exhaust woes
Short story: installed new catback vavlved exhaust. getting 3 CELs:P31D3 P12E9 P12E7
My Creader tool wont relearn the new system. Says it is out of range. I assume I need to adjust the actuator arm on the AFM module. NPP valves open and close between Z and touring mode. I do not feel like taking the rear bumper off again right now to gain acess to the AFM module linkages. Is it ok to continue to drive as is with this CEL?
My mind says yes, but just need confirmation. side note: company i got it from was zero help. Their advice was....take it to gm and have them reprogram the exhaust.
My Creader tool wont relearn the new system. Says it is out of range. I assume I need to adjust the actuator arm on the AFM module. NPP valves open and close between Z and touring mode. I do not feel like taking the rear bumper off again right now to gain acess to the AFM module linkages. Is it ok to continue to drive as is with this CEL?
My mind says yes, but just need confirmation. side note: company i got it from was zero help. Their advice was....take it to gm and have them reprogram the exhaust.
Last edited by AllCarFan; Mar 29, 2026 at 09:42 AM.
