Cadillac Repair: 88 cadillac seville idling high cant lower idle, cadillac seville, cadillac

Question
88 cadillac seville idling high can't lower idle..What do i do? What could it be?

Thanks

Answer
Check the computers for FAULT CODES via:

1. ignition ON. Engine OFF.

2. simultaneously push and hold the OFF and WARMER buttons until the whole display illuminates and then release the buttons.

3. Codes will start to appear and will stop at .7.0.

4. write down all the codes EXACTLY in the order in which they display and let me know what they are.


5. turn OFF ignition.