Hey guys, I recently had an aftermarket clutch installed and at the same time fitted my new AMS full exhaust system and new O2 housing on my 2009 Evo X GSR. When I picked the car up from the installer, he informed me that he saw the ASC light on when he reconnected the battery and started the car.
Can anyone give me some guidance on what could have caused this light to come on since the installer said he would not have troubled anything that would have caused this light to come on.

 

Read the error code with a scan tool and post the code here.