Volvo S60 check engine light on with error code P2187, requires oil separation box installation on Volvo S60

Some Volvo S60 owners report experiencing issues related to error code P2187, which indicates that the engine is running too lean at idle on Bank 1. This problem arises from an imbalance in the air-fuel mixture, where excess air enters the engine, leading to potential performance and emissions issues. To address this, many owners find that installing an oil separation box can help resolve the lean fuel mixture issue that triggers the check engine light. Additionally, troubleshooting steps such as checking for intake air leaks, inspecting oxygen sensors, and addressing ignition misfiring are commonly recommended. It is crucial for owners to tackle the root cause of the lean fuel mixture to prevent further complications with engine performance and emissions.