So after rebuilding the motor and cam install I'm getting a trans code from the 4l60. P0748..... Had it dyno tuned by DBR performance and once we got it back to the shop the code pops up. It drives fine and doesn't effect it at all but still don't like that it keeps popping up after it's cleared. What could this be caused from? I've read something about it being Pressure Control (PC) Solenoid Control Circuit. Any ideas why this is just now popping up?

 

Bump!

 

did they change the line pressure in the tune?

 

Not sure. I'm in Iraq so I wasn't there when they tuned it. Should they have?

 

that cod is thrown if you have an open or shorted pressure control solenoid.....low fluid can also throw this code

 

Thanks for the info. I'll have the shop check both.