Thank you for everyone's replies. I rebuilt the LED kit with 18GA themostate wires.

The problem was I did not know how it works, how to pess the light. This time, I hold the switch a little longer. I got 5 or 6 blinks (I am not sure), because on my third try, I only got one blinks. I will have to wait for the CE light to return.

Based on JimF's fault table:
5 blinks is EGR inoperative (bad valve or plug tube)
6 blinks is idle speed control inoperative. I don't know what it mean, the car have little over 100k miles. It run perfect, the idle is good.

Jack