Home >> BMW >> 2008 >> 750Li >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Self Diagnosis - Diagnostic Trouble Codes - DTC P1327-U1202 (N62) >> BMW Me9.2.3 (DTC P1327-U1202) >> DTC P2231, BMW Hex Code 0x2C37, BMW Code 11319: O2 Sensor Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 1) (SIG) >> Possible Fault Causes