P0128 2006 Ford Fusion Code - Coolant Thermostat
Quick Answer
The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. 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 2006 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 2006 Ford Fusion Description
What are the Possible Causes of the DTC P0128 2006 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 2006 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 2006 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 2006 Ford Fusion Code
1. What does the OBDII code P0128 mean on a 2006 Ford Fusion?
P0128 indicates that the engine coolant temperature is not reaching the expected level within a specific time, often caused by a thermostat issue.
2. What are the symptoms of the P0128 code in a 2006 Ford Fusion?
Symptoms include the check engine light turning on, poor fuel efficiency, and the engine taking longer than normal to warm up.
3. What causes the P0128 code on a 2006 Ford Fusion?
Common causes include a stuck-open thermostat, low coolant level, a faulty coolant temperature sensor, or wiring issues.
4. Can I drive my 2006 Ford Fusion with a P0128 code?
Yes, but it is not recommended for long-term driving as it can lead to poor fuel economy and potential engine wear due to improper operating temperatures.
5. How do I fix the P0128 code on a 2006 Ford Fusion?
The most common fix is replacing the thermostat. However, you should also check coolant levels and inspect the coolant temperature sensor and its wiring.
6. How much does it cost to repair the P0128 code on a 2006 Ford Fusion?
Replacing the thermostat typically costs $150–$300, depending on labor rates and parts prices.
7. Can a low coolant level trigger the P0128 code on a 2006 Ford Fusion?
Yes, low coolant levels can prevent the engine from reaching the proper operating temperature, causing the P0128 code.
8. How do I know if the thermostat is bad in my 2006 Ford Fusion?
A stuck-open thermostat may cause the engine to take longer to warm up, result in cooler-than-normal operating temperatures, and trigger the P0128 code.
9. Will resetting the check engine light fix the P0128 code on my 2006 Ford Fusion?
Resetting the light will clear the code temporarily, but the issue will return if the root cause, such as a faulty thermostat, is not fixed.
10. How long does it take to replace the thermostat on a 2006 Ford Fusion?
Replacing the thermostat typically takes 1–2 hours, depending on the mechanic's experience and the vehicle's condition.
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