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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P014F >> DTC P0117, P0118: ECT Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. Trouble Diagnosis Name (Trouble diagnosis content) DTC Detecting Condition Possible Cause
P0117 ECT SEN/CIRC (Engine coolant temperature sensor circuit Low input An excessively low voltage from the sensor is sent to ECM.
  • Harness or connectors (The sensor circuit is open or shorted.)
  • Engine coolant temperature sensor
P0118 ECT SEN/CIRC Engine coolant temperature sensor circuit High input) An excessively high voltage from the sensor is sent to ECM.