What are the faults of Geely automobile fault codes p 1523 and P2 177?

Throttle control unit, throttle closing position-performance problem

Throttle position motor, closed throttle position-performance

Category: power system (manufacturer's own meaning)

Detailed meaning: In the electronic throttle control (ETC) system, the throttle actuator is a stepping motor, which is responsible for controlling the throttle opening according to the instruction of the throttle control module.

Fault code: P2 177

English meaning: When leaving idle speed, the system (mixing ratio) is too lean (1 row).

The system is too idle (bank 1)

Category: Fuel, Air or Emission Control

Detailed meaning: Fuel fine-tuning means that the electronic control unit (ECU) controls the fuel delivery by increasing or decreasing the opening time of the injector, so that the engine can obtain the best air-fuel ratio (the mass ratio of air to gasoline is 14.7: 1). Too rich air-fuel ratio means too much oil transportation, and too thin air-fuel ratio means too little oil transportation. A system that is too lean means that the fuel quantity (relative intake air quantity) is low. The failure causes include air leakage behind the MAF sensor, PCV system leakage, oxygen sensor failure, exhaust leakage near the oxygen sensor, EGR leakage, dirty MAF sensor, blocked fuel injector and insufficient fuel supply from the fuel pump.