P1117 2009 FORD FUSION - Engine Coolant Temperature Sensor Intermittent
P1117 2009 FORD FUSION Causes
P1117 2009 FORD FUSION NotesMonitor the ECT on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.
First diagnose P1117 2009 FORD FUSION code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1117 2009 FORD FUSION code
Labor: 1.0The cost of diagnosing the P1117 2009 FORD FUSION code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1117 2009 FORD FUSION Symptoms
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P1117 2009 FORD FUSION DescriptionThe Engine Coolant Temperature (ECT) Sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a thermistor decreases as the temperature increases, and the resistance increases as the temperature decreases. The varying resistance changes the voltage drop across the sensor terminals and provides electrical signals to the Powertrain Control Module (PCM) corresponding to temperature.
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor (pull-up resister) in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The ECT measures the temperature of the engine coolant. The PCM uses the ECT input for fuel control and for cooling fan control. There are 3 types of ECT sensors; threaded, push-in, and twist-lock. The ECT sensor is located in an engine coolant passage.