OBD-II Trouble Code

P1117

P1117 - Engine Coolant Sensor intermittent/ECT Sensor Intermittent

P1117 Description

Indicates the ECT circuit became intermittently open or shorted while the engine was running. Note that on some vehicles which are not equipped with an ECT sensor, the CHT can be used and can set this DTC.

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

When is the code detected?

Possible Causes

Damaged harness.

Damaged sensor.

Damaged PCM.

Damaged harness connector.

Low engine coolant.

Possible Solution

Monitor the ECT or CHT on a scan tool, and look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.

Editor Notes