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P0117 2008 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit Low

Quick Answer

The P0117 code for a 2008 Ford Fusion indicates a problem with the Engine Coolant Temperature (ECT) Sensor Circuit being lower than the expected value. Common causes include Faulty ECT sensor, Damaged or corroded wiring in the ECT sensor circuit, Low coolant level or air pockets in the cooling system. 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
P0117 2008 Ford Fusion indicates Engine Coolant Temperature Sensor Circuit Low.
Common causes
Common causes include Faulty ECT sensor, Damaged or corroded wiring in the ECT sensor circuit, Low coolant level or air pockets in the cooling system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P0117 2008 Ford Fusion Description

The P0117 code for a 2008 Ford Fusion indicates a problem with the Engine Coolant Temperature (ECT) Sensor Circuit being lower than the expected value. The ECT sensor is a crucial component that monitors the temperature of the engine coolant and sends this information to the engine control module (ECM). This data is essential for the ECM to adjust fuel delivery and ignition timing to ensure optimal engine performance and efficiency.

OBDII Code P0117 2008 Ford Fusion - Engine Coolant Temperature Sensor Circuit Low
P0117 2008 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit Low

Common Causes of P0117 2008 Ford Fusion

  1. Faulty ECT sensor.
  2. Damaged or corroded wiring in the ECT sensor circuit.
  3. Low coolant level or air pockets in the cooling system.
  4. Issues with the ECM or other related sensors.
  5. Electrical issues such as a blown fuse or relay in the circuit.

Symptoms of P0117 2008 Ford Fusion

  1. Check Engine Light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Rough idling or stalling.
  4. Engine overheating or running hotter than usual.
  5. Poor heater performance in the cabin.

How to Fix P0117 2008 Ford Fusion

  1. Begin by diagnosing the ECT sensor using a multimeter to check for proper voltage readings.
  2. Inspect the wiring and connectors in the ECT sensor circuit for any damage or corrosion, repairing or replacing as needed.
  3. Verify the coolant level and bleed the cooling system to remove any air pockets that could affect sensor readings.
  4. Test the ECM and other related sensors to ensure they are functioning correctly.
  5. Clear the trouble code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0117 2008 Ford Fusion

The cost of repairing a P0117 code on a 2008 Ford Fusion can vary depending on the specific cause of the issue. In general, replacing a faulty ECT sensor can cost between $50 and $150 for the part, with additional labor costs ranging from $80 to $150 per hour. If the issue is related to wiring or other components, the total repair cost could be higher. It's recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's specific needs.

What does this mean?

Tech Notes for P0117 2008 Ford Fusion

Start by checking for coolant leaks, and if there are no leaks, the thermostat might be stuck closed and needs replacement. If the problem persists, change the Engine Coolant Temperature (ECT) sensor.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0117 2008 Ford Fusion Code

1. What are common symptoms of OBDII code P0117 on a 2008 Ford Fusion?

- Common symptoms include issues with the engine temperature gauge reading incorrectly, poor fuel economy, and potential overheating.

2. What causes the Engine Coolant Temperature Sensor Circuit Low code (P0117) on a 2008 Ford Fusion?

- The code P0117 is usually triggered by a faulty engine coolant temperature sensor, damaged wiring or connectors, or low engine coolant levels.

3. How can I diagnose the Engine Coolant Temperature Sensor Circuit Low code on my 2008 Ford Fusion?

- You can diagnose the issue by checking the engine coolant level, inspecting the sensor and its wiring for damage, and using an OBDII scanner to read the code and determine the exact problem.

4. Can I drive my 2008 Ford Fusion with the P0117 code?

- It is not recommended to drive the vehicle with the P0117 code, as it can lead to potential engine overheating and other issues. It is best to address the problem promptly.

5. How do I repair the Engine Coolant Temperature Sensor Circuit Low code on my 2008 Ford Fusion?

- The repair typically involves replacing the engine coolant temperature sensor, repairing any damaged wiring or connectors, and ensuring the engine coolant levels are adequate.

6. Will resetting the OBDII code P0117 on my 2008 Ford Fusion make it go away?

- Simply resetting the code will not fix the underlying issue causing the P0117 code. It is important to diagnose and repair the root cause of the problem.

7. How much does it cost to fix the P0117 code on a 2008 Ford Fusion?

- The cost of fixing the P0117 code can vary depending on the root cause of the problem, but it generally involves replacing the engine coolant temperature sensor, which can cost around $50 to $100.

8. Can a faulty engine coolant temperature sensor cause other issues besides the P0117 code on a 2008 Ford Fusion?

- Yes, a faulty engine coolant temperature sensor can cause other issues such as rough idling, poor fuel economy, and inaccurate temperature readings on the dashboard.

9. How long does it take to repair the P0117 code on a 2008 Ford Fusion?

- The repair time can vary depending on the experience of the mechanic and any additional issues found during diagnosis, but it typically takes around 1-2 hours to replace the engine coolant temperature sensor.

10. Is it possible to prevent the P0117 code from recurring on my 2008 Ford Fusion?

- To prevent the P0117 code from recurring, it's essential to perform regular maintenance on your vehicle, including checking coolant levels, inspecting the sensor and wiring for damage, and addressing any issues promptly.

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