What happened to Hyundai Elantra p0 12 1?

Hyundai Elantra p0 12 1 is a poor contact of the vehicle electronic throttle circuit. It is necessary to open the engine compartment cover of Hyundai Elantra and shake the throttle plug to tighten it. The specific operation steps are as follows:

First, open the door on the cab side of Hyundai Elantra. ?

Second, pull the hood switch on the left side of Hyundai Elantra driver's leg. ?

Third, lift the hood of Hyundai Elantra. ?

Fourth, support the hood of Hyundai Elantra with a support rod to ensure firm support and avoid danger. ?

5. Shake the throttle plug of Hyundai Elantra and plug it tightly.