P1117 2009 Ford Fusion Code - Engine Coolant Temperature Sensor Intermittent
Quick Answer
The Engine Coolant Temperature (ECT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1117 2009 Ford Fusion indicates Engine Coolant Temperature Sensor Intermittent.
- Common causes
- Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1117 2009 Ford Fusion Description
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.
What are the Possible Causes of the DTC P1117 2009 Ford Fusion?
- Low Engine Coolant Level
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Thermostat
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P1117 2009 Ford Fusion?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1117 2009 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1117 2009 Ford Fusion Code
What does the OBDII code P1117 mean for a 2009 Ford Fusion?
P1117 indicates an intermittent issue with the engine coolant temperature (ECT) sensor, suggesting the sensor is not providing consistent data to the vehicle’s computer.
What are the common symptoms of code P1117 in a 2009 Ford Fusion?
Symptoms may include engine overheating, poor fuel efficiency, difficulty starting the car, an illuminated check engine light, and erratic temperature gauge readings.
What causes P1117 in the 2009 Ford Fusion?
Common causes include a faulty ECT sensor, corroded or damaged wiring, loose electrical connections, or issues with the vehicle’s powertrain control module (PCM).
Can driving with the P1117 code damage the engine?
Yes, ignoring this code can lead to engine overheating or other performance issues, potentially causing serious damage to the engine components over time.
How can I diagnose code P1117 in my Ford Fusion?
Start by inspecting the ECT sensor, wiring, and connections for damage or corrosion. Use a multimeter to test sensor functionality and confirm proper resistance values.
How do I fix the P1117 code on a 2009 Ford Fusion?
Repairs may involve replacing the ECT sensor, repairing or replacing damaged wiring, securing loose connections, or reprogramming the PCM if necessary.
What tools are needed to address P1117 in a 2009 Ford Fusion?
Basic tools like a multimeter, socket wrench, and an OBDII scanner are typically needed to diagnose and repair this issue.
What is the cost of repairing the P1117 code on a 2009 Ford Fusion?
Repair costs vary but typically range from $50 to $200 for parts and labor, depending on whether the sensor or wiring needs replacement.
Can a faulty thermostat cause the P1117 code?
While the thermostat is not directly linked to the ECT sensor, a failing thermostat can cause erratic temperature readings, which may indirectly trigger this code.
How do I prevent the P1117 code from returning?
Regularly inspect wiring and connections, maintain proper coolant levels, and replace the ECT sensor at recommended intervals to prevent recurring issues.
Discuss the causes and fixes for P1117 2009 Ford Fusion OBDII Code
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