Idle speed problem of 19

The simplest way to eliminate it is to clean the throttle once. If it doesn't work, you have to go to the repair shop for inspection. 1, idle switch is not turned off. Diagnostic method: turn on the air conditioner and turn the steering wheel at idle speed. The engine speed does not increase, which can prove this fault. Troubleshooting: Adjust, repair or replace the throttle position sensor. 2. Idle speed control valve (ISC) fault diagnosis.