Home >> BMW >> 2016 >> 650i 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes - Bank 2 (N63TU) >> Fault Code Tests >> DTC P0391: BMW DTC 120F12; DME -- Camshaft Position Sensor 'B' Circuit Range/Performance (Bank 2) >> Service instruction