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Home >> BMW >> 2009 >> 550i Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Theory & Operation (N62) >> 1.15 Comprehensive Component Monitoring >> 1.15.5 Diagnosis of differential pressure sensor >> 1.15.5.1 Electrical checks

1.15.5.1 Electrical checks

P1197 (DDSSmax), P1198 (DDSSmin) 

The electrical check detects out of range values by comparing the pressure-dependent voltage of the differential pressure sensor with an upper and lower calibrated thresholds. A DDSSmax fault will be set if the voltage exceeds the upper calibrated threshold for a calibrated period of time. Likewise, a DDSSmin fault will be set if it undershoots the lower calibrated threshold for a calibrated period of time.