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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0153 (Qr25DE) >> DTC U0140 Can Communication Line >> On Board Diagnosis Logic

On Board Diagnosis Logic

This self-diagnosis has the one trip detection logic  .

DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
U0140 0140 Lost communication with BCM When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) with BCM for 2 seconds or more.
  • CAN communication line between BCM and ECM
  • CAN communication line open or shorted