TGO,

If you are not seeing a code come across the screen on the dash, suspect the wrench light is on due to low fluids. You can bring up any stored codes to come up on the screen by entering the password saved in the lift. Press the asterick key until you see enter password on the screen. Enter all 5's and hope it has not been changed from the factory. Enter 5 5's then press the pound key to enter the value. If it accepts the password, you will be able to navigate through the menu. If the password is not accepted, you will need the local dealer to check the codes with a program. Thanks.