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Engine-Codes – Ford – P0118 2008 Ford Fusion

P0118 2008 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit High

Quick Answer

The P0118 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates that there is a high voltage condition in the engine coolant temperature sensor circuit. Common causes include Faulty engine coolant temperature sensor, Wiring or connector issues in the sensor circuit, Low coolant level. 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 2008 Ford Fusion indicates Engine Coolant Temperature Sensor Circuit High.
Common causes
Common causes include Faulty engine coolant temperature sensor, Wiring or connector issues in the sensor circuit, Low coolant level.
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 Aug 30, 2024
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Code P0118 2008 Ford Fusion Description

The P0118 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates that there is a high voltage condition in the engine coolant temperature sensor circuit. The engine coolant temperature sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel mixture, ignition timing, and other engine functions to ensure optimal performance and fuel efficiency. When the sensor detects a high voltage, it signifies that the engine coolant temperature is above the specified range, which can lead to poor engine performance, reduced fuel efficiency, and potential engine damage if not addressed promptly.

OBDII Code P0118 2008 Ford Fusion - Engine Coolant Temperature Sensor Circuit High
P0118 2008 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit High

Common Causes of P0118 2008 Ford Fusion

  1. Faulty engine coolant temperature sensor
  2. Wiring or connector issues in the sensor circuit
  3. Low coolant level
  4. Cooling system malfunction
  5. ECM malfunction

Symptoms of P0118 2008 Ford Fusion

  1. Engine overheating
  2. Poor fuel economy
  3. Rough idling or stalling
  4. Check Engine Light illuminated
  5. Reduced engine power

How to Fix P0118 2008 Ford Fusion

  1. Begin by checking the coolant level and ensuring there are no leaks in the cooling system.
  2. Inspect the wiring and connectors associated with the engine coolant temperature sensor for any damage or corrosion.
  3. Test the engine coolant temperature sensor using a multimeter to determine if it is functioning properly.
  4. If the sensor is found to be faulty, replace it with a new one following the manufacturer's guidelines.
  5. Clear the DTC codes using a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0118 2008 Ford Fusion

The cost estimate for resolving a P0118 code on a 2008 Ford Fusion can vary depending on the specific cause of the issue. In general, the price for a new engine coolant temperature sensor ranges from $20 to $50, while labor costs for sensor replacement and diagnostic testing can range from $100 to $200. Overall, the total repair cost for this issue is typically between $120 and $250. However, as mentioned earlier, actual costs may differ based on factors such as location, shop rates, and additional repairs or parts needed. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0118 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 P0118 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0118 on a 2008 Ford Fusion?

The common symptoms of OBDII code P0118 on a 2008 Ford Fusion include the engine running hot or cold, poor fuel economy, and the check engine light coming on.

2. What does the OBDII code P0118 in a 2008 Ford Fusion indicate?

The OBDII code P0118 in a 2008 Ford Fusion indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit reading higher than normal.

3. What are the possible causes of OBDII code P0118 in a 2008 Ford Fusion?

Possible causes of OBDII code P0118 in a 2008 Ford Fusion include a faulty ECT sensor, damaged wiring or connectors, low coolant level, or a malfunctioning thermostat.

4. How can I diagnose the OBDII code P0118 in my 2008 Ford Fusion?

To diagnose the OBDII code P0118 in a 2008 Ford Fusion, you can use a scan tool to read the trouble code, check the ECT sensor's wiring and connectors, test the sensor's resistance, and inspect the coolant level and thermostat.

5. Can I still drive my 2008 Ford Fusion with OBDII code P0118?

It is not recommended to drive your 2008 Ford Fusion with OBDII code P0118 as it can lead to overheating or other engine issues. It's best to address the problem promptly.

6. How do I repair OBDII code P0118 in my 2008 Ford Fusion?

To repair OBDII code P0118 in your 2008 Ford Fusion, you may need to replace the Engine Coolant Temperature (ECT) sensor, repair any damaged wiring or connectors, top up the coolant level, or replace a faulty thermostat.

7. Will resetting the check engine light fix OBDII code P0118 in my 2008 Ford Fusion?

Resetting the check engine light may temporarily turn it off, but it won't fix the underlying issue causing OBDII code P0118 in your 2008 Ford Fusion. It's important to diagnose and address the root cause.

8. How much does it cost to fix OBDII code P0118 in a 2008 Ford Fusion?

The cost to fix OBDII code P0118 in a 2008 Ford Fusion can vary depending on the specific cause of the issue. It could range from a simple sensor replacement to more extensive repairs involving wiring or cooling system components.

9. Can a DIY enthusiast fix OBDII code P0118 in a 2008 Ford Fusion?

A DIY enthusiast with the necessary tools and skills may be able to fix OBDII code P0118 in a 2008 Ford Fusion by following repair guides or online tutorials. However, it's important to proceed with caution and ensure proper diagnosis.

10. How often does OBDII code P0118 occur in a 2008 Ford Fusion?

OBDII code P0118 can occur in a 2008 Ford Fusion due to various reasons related to the Engine Coolant Temperature (ECT) sensor circuit. The frequency of occurrence may vary depending on driving conditions and maintenance history.

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