Cadillac: service emission system light comes on, wheel alighnment, emission system

Question
i have a 96 sedan deville,122,000 ml. replace radiator, new tires, wheel alighnment. car runs great, service emission system light comes on. what is involved with the emission system? and is it exspensive to correct this problem?

Answer
Do you have a CHECK ENGINE light and or any fault CODES in your computer syatem?.

Perform this test:

1. Ignition ON. Engine OFF.

2. Simultaneously push and hiold the OFF and WARMER buttons for 3 seconds and release them. CODES will start to appear and stop when you see PCM?.

3. I need to know EXACTLY how the codes display as if you were video taping them.