What the hell is wrong with Cruze code84?

Cruze code84 is a throttle position sensor fault. The following are the effects of throttle failure: 1. Insufficient power: Damage to the throttle position sensor will lead to engine jitter and unstable idle speed. When the car is running, the engine is easy to stall or it is difficult to start. Troubleshoot by replacing the throttle position sensor with a new one. 2. Abnormal idle speed: The failure of the throttle sensor will affect the idle speed control function of the engine computer, resulting in abnormal idle speed operation of the engine (such as excessive or low idle speed, unstable idle speed and easy flameout) or abnormal acceleration of the engine (such as engine jitter and slow acceleration response).