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Home >> Infiniti >> 2011 >> M56 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P006A To P0153 (VK56VD) >> DTC P0117, P0118: ECT Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC DETECTION LOGIC CHART

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 engine coolant temperature 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.