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Home >> BMW >> 2014 >> 528i xDrive >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N20 & N26) >> Fault Code Tests >> DTC P2421: BMW DTC 191A21; DME -- EVAP System Vent Valve Stuck Open >> Fault description

Fault description

The Diagnosis monitors the flow through the fuel tank ventilation line (1st inlet point: flows into intake pipe after throttle valve flap).

Malfunction monitoring conditions

Technical details are not important for troubleshooting during service