So my 2005 mustang drives normally, it does however rev up 1500 rpms when climbing baby hills in cruise control (torque converter maybe?)

To the point: od light is flashing and i used my diablosport intune to read the codes and cannot find anything, says no codes found. About two weeks ago i just cleared the codes just because and it got rid of the light.

can someone help me out?
I've been tuning my car with this ****ty tuner and changing headlights and disconnecting the battery a lot the past month if thats the cause of anything.

2005 mustang
automatic
v6
96k miles

 

Low fluid?

 

*Update*
I used a different code scanner and got back a trouble code -po775b- pressure control solenoid b.

How vital is it to fix this? Heard it's a 500$ repair

 

Not sure on that code fix but if your fluid is low you can have major issues. I would check the fluid level.