P1529 Auxillary Speed Idle Control
 

Car: 2001 Hyundai Elantra GT

Problem: I got CheckEngine light off and on for about a month. Sometimes
it didnt appear for a week and suddenly appeared. Everytime CheckEngine
light appears, the car goes on a low gear kind of stuff, like a OD off
mode or something of that sort.

Took to autozone and they told me it is P1529 Auxillary Speed Idle
Control.

Any advise ? Appreciate your help.