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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 P0125 ECT Sensor › On Board Diagnosis Logic

On Board Diagnosis Logic

NOTE:
  • If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117 or P0118. Refer to "ON BOARD DIAGNOSIS LOGIC ".
  • If DTC P0125 is displayed with P0116, first perform the trouble diagnosis for DTC P0116. Refer to "ON BOARD DIAGNOSIS LOGIC ".
DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0125 0125 Insufficient engine coolant temperature for closed loop fuel control
  • Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine.
  • Engine coolant temperature is insufficient for closed loop fuel control.
  • Harness or connectors (High resistance in the circuit)
  • Engine coolant temperature sensor
  • Thermostat


DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0127 0127 Intake air temperature too high Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor.
  • Harness or connectors (Intake temperature sensor circuit is open or shorted)
  • Intake air temperature sensor
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