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Home >> BMW >> 2016 >> 335i Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1084 (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

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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

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