Home >> BMW >> 2018 >> X5 xDrive35d >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes (N47 & N57, Diesel) >> Fault Code Tests >> DTC P0299: BMW DTC 121531; DME -- Turbocharger/Supercharger 'A' UNDERBOOST Condition >> Fault effect and breakdown warning