CEL after akrapovic exhaust install
Thread Starter
Racer
Joined: Apr 2017
Posts: 415
Likes: 53
From: Murfreesboro TN
CEL after akrapovic exhaust install
Hey guys, I know it has been discussed but was hoping to get more clarification as it’s a little different scenario and I know not many has this exhaust.
The akrapovic has all the valves on their exhaust so they have afm and NPP valves. I had this installed at the dealership and it seemed fine yet within 24 hrs of picking up I have a cel throwing codes P12F0, P31D0, and P31DE.
Is this due to the exhaust? Even having all of the valves in place? Thanks for the help.
The akrapovic has all the valves on their exhaust so they have afm and NPP valves. I had this installed at the dealership and it seemed fine yet within 24 hrs of picking up I have a cel throwing codes P12F0, P31D0, and P31DE.
Is this due to the exhaust? Even having all of the valves in place? Thanks for the help.
Instructor
Joined: Oct 2021
Posts: 145
Likes: 109
From: Chandler, AZ
Hey guys, I know it has been discussed but was hoping to get more clarification as it’s a little different scenario and I know not many has this exhaust.
The akrapovic has all the valves on their exhaust so they have afm and NPP valves. I had this installed at the dealership and it seemed fine yet within 24 hrs of picking up I have a cel throwing codes P12F0, P31D0, and P31DE.
Is this due to the exhaust? Even having all of the valves in place? Thanks for the help.
The akrapovic has all the valves on their exhaust so they have afm and NPP valves. I had this installed at the dealership and it seemed fine yet within 24 hrs of picking up I have a cel throwing codes P12F0, P31D0, and P31DE.
Is this due to the exhaust? Even having all of the valves in place? Thanks for the help.
Thread Starter
Racer
Joined: Apr 2017
Posts: 415
Likes: 53
From: Murfreesboro TN
Melting Slicks
Joined: Apr 2021
Posts: 2,759
Likes: 2,328
From: Simi Valley, CA
2022 C8 of the Year Finalist - Modified
Yes, as others have said, the valves need a relearn. The document number for the GM procedure - must be performed by a dealer - can be found on the Borla website.
Instructor
Joined: Oct 2014
Posts: 236
Likes: 163
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Melting Slicks
Joined: Jul 2011
Posts: 2,800
Likes: 166
2023 C6 of the Year Finalist - Modified
If the car does not accept the relearn, the installer may have not set the valves to their original position before turning off the car and removing the existing position. The position of all four valves should be marked prior to exhaust removal and the motor's positions should be clocked back to that position when installed back on your new exhaust.
