P1117

P1117 OBD Code Definition:
P1117 Engine Coolant Sensor intermittent/ECT Sensor Intermittent
P1117 OBD Code Description:

Possible Symptoms
  • Engine Light ON (or Service Engine Soon Warning Light)

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON

Possible Causes

  • Failed O2 sensor heater circuit
  • Wiring Harness issue
  • Failing ECM

Possible Solutions

  • Inspect and test O2 sensor heater circuit as per repair manual
  • Inspect and test wiring harness as per wiring diagram
  • Replace ECM if O2 sensor and wiring harness are to factory design

 

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