LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2014 >> 328d >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N47 & N57, Diesel) >> Fault Code Tests >> DTC P12A8: BMW DTC 121202; DME -- Boost Sensor 'A' After Running Diagnosis Pressure Too Low >> Fault description

Fault description

Diagnosis monitors the DME after-run to determine whether the ambient pressure sensor, intake pipe pressure sensor and pressure sensor upstream of the throttle valve all measure the same pressure.

Fault monitoring conditions:

The fault is detected when there is a large deviation from the mean value of the pressure sensors on the charging pressure sensor (ambient pressure, charging pressure, intake pipe pressure).