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Engine-Codes – Ford – P0128 2007 Ford Fusion

P0128 2007 Ford Fusion Code - Coolant Thermostat

Quick Answer

The P0128 code on a 2007 Ford Fusion indicates an issue with the coolant thermostat. Common causes include Faulty thermostat, Coolant leak, Malfunctioning temperature 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
P0128 2007 Ford Fusion indicates Coolant Thermostat.
Common causes
Common causes include Faulty thermostat, Coolant leak, Malfunctioning temperature 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0128 2007 Ford Fusion Description

The P0128 code on a 2007 Ford Fusion indicates an issue with the coolant thermostat. The coolant thermostat is a crucial component of the vehicle's cooling system, responsible for regulating the temperature of the engine by controlling the flow of coolant. When this code is triggered, it means that the engine is not reaching the proper operating temperature within a specified time frame, usually due to a thermostat that is stuck open or opening too soon.

OBDII Code P0128 2007 Ford Fusion - Coolant Thermostat
P0128 2007 Ford Fusion Code - Coolant Thermostat

Common Causes of P0128 2007 Ford Fusion

  1. Faulty thermostat
  2. Coolant leak
  3. Malfunctioning temperature sensor
  4. Air pockets in the cooling system
  5. Cooling system blockage

Symptoms of P0128 2007 Ford Fusion

  1. Engine running colder than normal
  2. Decreased fuel efficiency
  3. Check Engine Light illuminated
  4. Poor heater performance
  5. Overheating in extreme cases

How to Fix P0128 2007 Ford Fusion

  1. Begin by diagnosing the issue using a scan tool to retrieve the trouble code and checking the coolant level and condition.
  2. Inspect the thermostat for proper operation and replace it if necessary.
  3. Check for any coolant leaks and repair them accordingly.
  4. Bleed the cooling system to remove any air pockets that may be affecting the thermostat's operation.
  5. Test drive the vehicle to ensure that the engine reaches the proper operating temperature and that the code does not reappear.

Cost to Fix P0128 2007 Ford Fusion

The typical repair costs for a coolant thermostat issue on a 2007 Ford Fusion can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P0128 2007 Ford Fusion

Start by checking for coolant leaks, if there are not leaks the thermostat might be stuck open or closed and may need to be replaced, you still have an issue the engine coolant temp sensor or cylinder head temp sensor.

When is the Code Detected?

The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.

Need more information about the P0128 2007 Ford Fusion code?

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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 P0128 2007 Ford Fusion Code

1. What does OBDII code P0128 on a 2007 Ford Fusion indicate?

The OBDII code P0128 on a 2007 Ford Fusion indicates a problem with the coolant thermostat.

2. What are the common symptoms of a P0128 code on a 2007 Ford Fusion?

Common symptoms of a P0128 code on a 2007 Ford Fusion include the engine running cooler than normal, the temperature gauge not reaching operating temperature, and a decrease in fuel efficiency.

3. What are the possible causes of a P0128 code on a 2007 Ford Fusion?

Possible causes of a P0128 code on a 2007 Ford Fusion include a faulty thermostat, a stuck-open thermostat, low coolant levels, a malfunctioning engine coolant temperature sensor, or a problem with the cooling system.

4. How can I diagnose a P0128 code on a 2007 Ford Fusion?

To diagnose a P0128 code on a 2007 Ford Fusion, you can start by checking the coolant level, inspecting the thermostat for proper operation, testing the engine coolant temperature sensor, and ensuring the cooling system is functioning correctly.

5. Can I continue driving my 2007 Ford Fusion with a P0128 code?

It is not recommended to continue driving your 2007 Ford Fusion with a P0128 code as it can lead to engine overheating and potential damage. It is best to address the issue promptly.

6. How do I repair a P0128 code on a 2007 Ford Fusion?

To repair a P0128 code on a 2007 Ford Fusion, you may need to replace the thermostat, flush and refill the coolant, check and replace the engine coolant temperature sensor if necessary, and ensure the cooling system is working properly.

7. Is it safe to reset the OBDII code P0128 on a 2007 Ford Fusion and continue driving?

Resetting the OBDII code P0128 on a 2007 Ford Fusion without addressing the underlying issue is not recommended as the problem may persist, potentially leading to further damage. It's best to diagnose and repair the root cause of the code.

8. How much does it cost to fix a P0128 code on a 2007 Ford Fusion?

The cost to fix a P0128 code on a 2007 Ford Fusion can vary depending on the underlying issue, the parts needed for repair, and labor costs. It is advisable to consult a mechanic for a more accurate estimate.

9. Can a DIY enthusiast fix a P0128 code on a 2007 Ford Fusion?

Depending on your mechanical skills and access to tools, a DIY enthusiast may be able to fix a P0128 code on a 2007 Ford Fusion by replacing the thermostat or performing basic diagnostic checks. However, more complex issues may require professional assistance.

10. How often does a P0128 code occur in a 2007 Ford Fusion?

A P0128 code in a 2007 Ford Fusion can occur sporadically due to various factors such as thermostat wear, coolant system issues, or sensor malfunctions. Regular maintenance and monitoring can help prevent the recurrence of this code.

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