What causes the EA888 engine to report a rich condition in cylinder 1 system?

[DelLondon]

The reasons for the EA888 engine reporting a rich condition in cylinder 1 system are: 1. Increased carbon deposits in the combustion chamber reduce the combustion chamber volume, increasing the compression ratio, resulting in higher cylinder pressure; 2. Overly rich air-fuel mixture in the combustion chamber or excessively low engine temperature; 3. Poor exhaust flow or a clogged catalytic converter can also lead to high cylinder pressure. The automobile engine is the power-generating device of a vehicle, serving as its heart, and determines the vehicle's power performance, fuel economy, stability, and environmental friendliness. Depending on the power source, automobile engines can be classified into diesel engines, gasoline engines, electric vehicle motors, and hybrid systems, among others.