The fault light of Volkswagen Passat Yu Ling 2.0 is on, and the fault code P2 187 is displayed. The system is too thin when idling. One cylinder bank is 1. Who can help me solve it?

It is caused by less oil and more gas, air leakage in intake system, insufficient ignition performance of spark plug and low fuel injection quantity of nozzle. It is necessary to pay attention to whether the waste gas valve is aging, replace the spark plug and clean the nozzle.

Extended data:

Idle speed is too slow

Idle speed is too thin, which means that the air-fuel ratio in closed-loop state is low and the load adjustment exceeds the upper limit.

Fault code P2 187

English meaning: When idling, the system (mixing ratio) is too thin (first row).

English meaning: system

also

slanting

exist

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. (Mass ratio of air to gasoline 1)

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 air flow (MAF) sensor, fuel injector blockage and insufficient fuel supply of the fuel pump.

This OBD fault code applies to all car manufacturers. Generally speaking, either the air intake system leaks or the fuel injector is blocked.