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P1117 - Engine Coolant Temperature (ECT) Sensor Circuit Intermittent

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P1117 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT INTERMITTENT

Description:  This DTC sets when the ECT circuit is intermittently open or short while the engine is running.
Possible Causes: 
  • Damaged ECT harness or connector
  • Damaged ECT sensor
  • ECT circuit open
  • ECT circuit short to ground
  • Low engine coolant
Diagnostic Aids:  Monitor the ECT PID on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR .