P0128 2009 Ford Fusion Code - Coolant Thermostat
Quick Answer
Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor, Faulty engine coolant thermostat. 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 2009 Ford Fusion indicates Coolant Thermostat.
- Common causes
- Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor, Faulty engine coolant thermostat.
- 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 P0128 2009 Ford Fusion Description
What are the Possible Causes of the DTC P0128 2009 Ford Fusion?
- Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor circuit poor electrical connection
How to Fix the DTC P0128 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 P0128 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 P0128 2009 Ford Fusion Code
1. What does OBDII code P0128 mean for a 2009 Ford Fusion?
- OBDII code P0128 on a 2009 Ford Fusion indicates a problem with the coolant thermostat, specifically that the engine is not reaching normal operating temperature within a specified time frame.
2. What are common symptoms of a P0128 code in a 2009 Ford Fusion?
- Common symptoms of a P0128 code on a 2009 Ford Fusion include the engine running colder than usual, a decrease in fuel efficiency, and the Check Engine light illuminating on the dashboard.
3. What are the possible causes of a P0128 code in a 2009 Ford Fusion?
- The most common causes of a P0128 code on a 2009 Ford Fusion are a faulty thermostat, a malfunctioning engine coolant temperature sensor, low coolant level, or a problem with the cooling system.
4. How can I diagnose a P0128 code on my 2009 Ford Fusion?
- To diagnose a P0128 code on a 2009 Ford Fusion, you can start by checking the coolant level, inspecting the thermostat for proper operation, testing the engine coolant temperature sensor, and examining the cooling system for any leaks or blockages.
5. Can I continue driving my 2009 Ford Fusion with a P0128 code?
- It is not recommended to continue driving your 2009 Ford Fusion with a P0128 code, as it can lead to decreased fuel efficiency, engine performance issues, and potential damage to the engine due to operating at lower temperatures.
6. How do I repair a P0128 code on my 2009 Ford Fusion?
- The most common repair for a P0128 code on a 2009 Ford Fusion is to replace the thermostat. Additionally, you may need to address any other underlying issues such as a faulty engine coolant temperature sensor or cooling system problems.
7. Can a DIY enthusiast fix a P0128 code on a 2009 Ford Fusion?
- While replacing the thermostat for a P0128 code on a 2009 Ford Fusion is a relatively straightforward task, diagnosing and fixing other potential issues may require more advanced automotive knowledge and tools. It is recommended to consult a professional mechanic for complex repairs.
8. How much does it cost to repair a P0128 code on a 2009 Ford Fusion?
- The cost to repair a P0128 code on a 2009 Ford Fusion can vary depending on the underlying issue and whether you choose to do the repair yourself or take it to a mechanic. Generally, the cost of replacing a thermostat ranges from $150 to $300.
9. Will resetting the OBDII code clear the P0128 code on a 2009 Ford Fusion?
- Resetting the OBDII code may temporarily clear the P0128 code on a 2009 Ford Fusion, but if the underlying issue causing the code is not addressed, the Check Engine light will likely reappear once the problem is detected again.
10. How often does a P0128 code occur in a 2009 Ford Fusion?
- A P0128 code in a 2009 Ford Fusion can occur due to various factors such as age, mileage, and maintenance history. It is not uncommon for this code to appear as the vehicle gets older and the cooling system components wear out.
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