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Home >> Infiniti >> 2010 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0327 To P0850 >> DTC P0462, P0463: Fuel Level Sensor >> On Board Diagnosis Logic

On Board Diagnosis Logic

NOTE:
  • If DTC P0462 or P0463 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to U1000, U1001 CAN COMM CIRCUIT .
  • If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to P0607 ECM .

This diagnosis indicates the former, to detect open or short circuit malfunction.

DTC DETECTING CONDITION AND POSSIBLE CAUSE REFERENCE CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0462
0462		 Fuel level sensor circuit low input An excessively low voltage from the sensor is sent to ECM.
  • Harness or connectors (The CAN communication line is open or shorted)
  • Harness or connectors (The sensor circuit is open or shorted)
  • Combination meter
  • Fuel level sensor
P0463
0463		 Fuel level sensor circuit high input An excessively high voltage from the sensor is sent to ECM.
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