Corsa quality issues: code P12EA
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 36
Likes: 14
Corsa quality issues: code P12EA
I just installed the Corsa 21100 system that retains both NPP and AFM functionality. The first X-pipe was formed poorly and had to be replaced, which Corsa did promptly. The electrical connector for one of the NPP valve actuators was a poor fit, and a day after having the dealer relearn the system I have code P12EA (Cylinder Deactivation Exhaust Flow Valve Closed Position Bank 1) which I did not have before the relearn. There are no obvious operating problems.
Any thoughts?
Thanks
Any thoughts?
Thanks
Thread Starter
Intermediate
Joined: Jul 2013
Posts: 36
Likes: 14
I can see the AFM valve linkages from behind the car. Can anyone tell me what position they should be in on start up? I'd like to see if both or either are moving/getting commands from the computer. On start up both appear to have the linkage in the same position (high). If only bank 1 is malfunctioning they should operate differently from each other.
Melting Slicks
Joined: Mar 2005
Posts: 2,352
Likes: 230
From: Northeast FL
Might need to do the relearn again. The Vette tech at my dealer had to do it three times before it took. Also, the relearn has to be done in a specific sequence for the AFM and NPP. GM document ID 5406413 covers this.
Melting Slicks
Joined: Apr 2021
Posts: 2,759
Likes: 2,328
From: Simi Valley, CA
2022 C8 of the Year Finalist - Modified
My dealer had to do the relearn procedure twice on my Borla exhaust. Apparently one of the new valves was a little "sticky" until exercised for a while. Corsa might be the same.
