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Home >> BMW >> 2016 >> 328d >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N47 & N57, Diesel) >> Fault Code Tests >> DTC P1290: BMW DTC 123401; DME -- Cold Start Turbocharger/Supercharger WASTEGATE 'A' Stop Not Learned >> Fault description

Fault description

The diagnosis monitors the electrical wastegate valve (valid limit positions) during the catalytic converter heating.

Fault monitoring conditions:

The fault is identified if during the catalytic converter heating the desired position of the electrical wastegate valve is not reached.