After installing my stg 3, my CEL came on and I pulled the code PO315 "Crank Shaft Position System Variation not Learned" can anyone tell me what's going on? I think it has something to do with the new PCM.

 

Do a case learn, should take care of that...need to use a Tech 2 from the dealership. I am not sure if you can do that with HPTuners or not.

This happens when you swap in a PCM that have never been in the car before. This should not affect performance, at least not on the older cars - not sure about the Coby's

 

thanks