AutoCodes – Ford – P0118 2007 Ford Fusion

P0118 2007 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit High

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty engine coolant thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor. 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: P0118 2007 Ford Fusion indicates Engine Coolant Temperature Sensor Circuit High.
Common causes: Common causes include Low engine coolant level, Faulty engine coolant thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor.
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.

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Code Popularity 5,475

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 02, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0118 2007 Ford Fusion Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Powertrain Control Module (PCM). The modified signal returns to the PCM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. The Diagnostic Trouble Code (DTC) indicates the sensor signal is greater than the self-test maximum. The ECT sensor maximum is 4.6 volts or -50°C (-58°F).

OBDII Code P0118 2007 Ford Fusion - Engine Coolant Temperature Sensor Circuit High - AutoCodes.com — P0118 2007 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P0118 2007 Ford Fusion?

Low engine coolant level
Faulty engine coolant thermostat
Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0118 2007 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.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2007 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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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 P0118 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P0118 in a 2007 Ford Fusion?

- Common symptoms include the engine overheating, inaccurate temperature gauge readings, poor fuel efficiency, and potential stalling or rough idling.

2. What does the OBDII code P0118 indicate in a 2007 Ford Fusion?

- The code indicates a high voltage signal from the Engine Coolant Temperature (ECT) sensor circuit, suggesting a problem with the sensor or its wiring.

3. What are the possible causes of OBDII code P0118 in a 2007 Ford Fusion?

- The potential causes include a faulty ECT sensor, a short or open circuit in the sensor wiring, a malfunctioning thermostat, or issues with the Engine Control Module (ECM).

4. How can I diagnose the OBDII code P0118 in my 2007 Ford Fusion?

- To diagnose P0118, you can use a scan tool to check the ECT sensor's voltage readings, inspect the sensor and its wiring for damage, and test the thermostat's functionality.

5. Can I drive my 2007 Ford Fusion with OBDII code P0118?

- It is not recommended to drive the vehicle with P0118, as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0118 in a 2007 Ford Fusion?

- Repair options include replacing the faulty ECT sensor, repairing any damaged wiring, checking and potentially replacing the thermostat, and resetting the trouble code.

7. Is it possible to reset the OBDII code P0118 in a 2007 Ford Fusion?

- Yes, after addressing the underlying issue causing P0118, you can reset the trouble code using an OBDII scanner to clear the ECM's memory.

8. Will OBDII code P0118 affect my 2007 Ford Fusion's performance?

- Yes, P0118 can impact your vehicle's performance by causing issues like poor fuel efficiency, engine overheating, and potential drivability issues.

9. How much does it typically cost to repair OBDII code P0118 in a 2007 Ford Fusion?

- The cost of repairing P0118 can vary depending on the root cause, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

10. Can a DIY enthusiast fix OBDII code P0118 in a 2007 Ford Fusion?

- Depending on your skill level, you may be able to address P0118 by replacing the ECT sensor or checking the wiring. However, more complex issues may require professional assistance.