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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 148 (Engine Control System - DTCS U0101 To P0183) >> DTC P0125: ECT Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

WARNING: This page is about a different car, the 2013 Infiniti M56. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to "DTC LOGIC ".
DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0125 ECT SENSOR (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