P0128 Nissan:Thermostat Function
If you own a Nissan and have recently seen the P0128 code pop up on your dashboard, you may be wondering . This code indicates that there is an issue with your engine’s thermostat function, which can lead to a variety of problems if left unaddressed. Fortunately, there are several steps you can take to diagnose and repair this issue, whether you choose to tackle it yourself or take it to a professional mechanic. In this article, we’ll explore what the P0128 code means, what causes it, and how to fix it so you can get back on the road with confidence.
Key Takeaways:
Meaning: P0128 code in Nissan indicates a malfunction in the thermostat function.
Causes: Faulty thermostat, low coolant level, damaged wiring, or a malfunctioning engine coolant temperature sensor can cause this code.
Symptoms: Check Engine Light (CEL) illuminates, poor fuel economy, engine overheating, and reduced engine performance are some of the symptoms of P0128 code.
Fixes: Fixing the thermostat, replacing the engine coolant temperature sensor, repairing the wiring, or adding coolant can help fix the P0128 code in Nissan.
P0128 Code Nissan Meaning
The P0128 code in a Nissan indicates that the engine is not reaching its optimal operating temperature within a certain amount of time. This can be caused by a malfunctioning thermostat, a faulty coolant temperature sensor, or a problem with the engine’s cooling system.
When the engine is not at the correct temperature, it can affect fuel efficiency and emissions, and can also cause damage to the engine over time. It is important to have this issue diagnosed and repaired as soon as possible to prevent further damage and ensure the vehicle is running efficiently.
Signs and Symptoms of P0128 Code in Nissan
The P0128 code in Nissan indicates a problem with the thermostat function. It means that the engine is not reaching the proper operating temperature within a specified time frame. This can lead to poor fuel economy, reduced engine performance, and increased emissions. Here are some of the signs and symptoms of the P0128 code in Nissan:
- Check Engine Light: The most common symptom of the P0128 code is the illumination of the check engine light on the dashboard. This light indicates that there is a problem with the engine that needs to be addressed.
- Low Engine Temperature: Another symptom of the P0128 code is that the engine temperature gauge may not reach the normal operating temperature. This can cause the engine to run inefficiently and reduce fuel economy.
- Poor Fuel Economy: If the engine is not reaching the proper operating temperature, it can cause the fuel to burn less efficiently, leading to poor fuel economy.
- Reduced Engine Performance: The P0128 code can also cause reduced engine performance, as the engine may not be able to produce the power it needs to operate at peak efficiency.
- Increased Emissions: When the engine is not operating at the proper temperature, it can produce more emissions than it should. This can lead to increased pollution and harm to the environment.
If you notice any of these symptoms, it is important to have your Nissan checked by a qualified mechanic. They can diagnose the problem and recommend the necessary repairs to fix the P0128 code. Ignoring this code can lead to more serious engine problems down the road, so it is important to address it as soon as possible.
P0128 Code Nissan Causes
Here are some of the possible causes of the P0128 code in Nissan vehicles:
- Failed Thermostat: The most common cause of the P0128 code is a failed thermostat. When the thermostat fails, it can get stuck in the open position, which allows coolant to flow through the engine too quickly, causing it to run too cold. Alternatively, it can get stuck in the closed position, which restricts the flow of coolant, causing the engine to overheat.
- Low Coolant Level: If the coolant level is low, it can cause the engine to overheat, triggering the P0128 code. Low coolant levels can be caused by leaks in the cooling system or a faulty radiator cap.
- Faulty Coolant Temperature Sensor: The coolant temperature sensor is responsible for sending signals to the engine control module (ECM) to adjust the engine’s temperature. If the sensor is faulty, it can send incorrect signals to the ECM, causing the engine to run too cold or too hot.
- Failed Water Pump: The water pump is responsible for circulating the coolant through the engine. If the water pump fails, it can cause the engine to overheat, triggering the P0128 code.
- Blocked Radiator: If the radiator is blocked, it can restrict the flow of coolant through the engine, causing it to overheat. A blocked radiator can be caused by debris or sediment buildup.
- Failed Engine Control Module: In rare cases, a failed engine control module (ECM) can cause the P0128 code. The ECM is responsible for controlling the engine’s temperature, and if it fails, it can send incorrect signals to the thermostat, causing it to malfunction.
If you are experiencing the P0128 code in your Nissan vehicle, it is important to have it diagnosed
Fixes for P0128 Code Nissan
Here are some fixes for the P0128 code in Nissan:
- Replace the thermostat: A malfunctioning thermostat can cause the engine to run too cool, which can trigger the P0128 code. Replacing the thermostat can solve the problem.
- Replace the coolant temperature sensor: If the coolant temperature sensor is faulty, it may not be able to accurately measure the engine’s temperature, which can trigger the P0128 code. Replacing the sensor can solve the problem.
- Check the cooling system: A problem with the engine’s cooling system, such as a leak or a clogged radiator, can cause the engine to run too cool and trigger the P0128 code. Checking the cooling system and fixing any issues can solve the problem.
- Check the engine’s thermostat housing: If the thermostat housing is cracked or damaged, it can cause the engine to run too cool and trigger the P0128 code. Checking the housing and replacing it if necessary can solve the problem.
- Check the engine’s coolant level: If the engine’s coolant level is low, it can cause the engine to run too cool and trigger the P0128 code. Checking the coolant level and topping it off if necessary can solve the problem.
How Much Will it Cost to Fix P0128 Code in Nissan?
The P0128 code in Nissan indicates that the engine is not reaching its optimal operating temperature within a specified time frame. This could be due to a malfunctioning thermostat, coolant temperature sensor, or a faulty engine coolant temperature (ECT) sensor.
The cost of fixing the P0128 code in Nissan depends on the root cause of the problem. If it is a faulty thermostat, the cost of replacement could range from $150 to $300, including labor charges. If the issue is with the coolant temperature sensor or ECT sensor, the cost of replacement could be around $100 to $200, including labor charges.
However, it is important to note that the cost of fixing the P0128 code in Nissan may vary depending on the location, make, and model of the vehicle. It is recommended to get a proper diagnosis from a certified mechanic to determine the exact cause of the problem and the cost of fixing it.
Possible Causes and Fixes of Code P0128 Nissan
| Possible Cause | Fix | Cost to Fix |
|---|---|---|
| Thermostat Stuck Open | Replace Thermostat | $150-$300 |
| Low Engine Coolant Level | Refill Coolant and Check for Leaks | $50-$100 |
| Faulty Engine Coolant Temperature Sensor | Replace Sensor | $100-$200 |
| Faulty Engine Control Module (ECM) | Replace ECM | $500-$1000 |
How Serious is the P0128 Code on a Nissan?
The P0128 code on a Nissan indicates a problem with the thermostat function. This code is not a critical issue, but it should not be ignored. The thermostat is responsible for regulating the engine’s temperature, and if it is not functioning correctly, it can cause the engine to overheat or run too cold. This can lead to reduced fuel efficiency, increased emissions, and potential engine damage.
If the P0128 code is left unaddressed, it can lead to more severe problems down the line. It is essential to have the issue diagnosed and repaired as soon as possible to prevent any further damage to the engine.
Can You Still Drive with the P0128 Code on Your Nissan?
Yes, you can still drive your Nissan with the P0128 code, but it is not recommended. The code indicates that the engine is not reaching its optimal operating temperature, which can lead to poor fuel economy, reduced engine performance, and increased emissions.
If you continue to drive with the P0128 code, you may also experience issues with your vehicle’s emissions system, which can result in a failed emissions test. Additionally, driving with a malfunctioning thermostat can cause damage to other engine components, leading to more costly repairs down the line.
Conclusion
In conclusion, the P0128 code in your Nissan indicates a problem with the thermostat function. It is important to address this issue promptly to prevent further damage to your vehicle. The most common causes of this code are a faulty thermostat, low coolant levels, or a malfunctioning coolant temperature sensor.
It is recommended to have a professional mechanic diagnose and repair the issue to ensure proper functioning of your vehicle. Regular maintenance and inspections can also help prevent this code from occurring in the future.
FAQ
What does the P0128 code mean for my Nissan?
The P0128 code indicates that the engine coolant temperature is below the expected range for the engine operating conditions. This could be caused by a malfunctioning thermostat or a problem with the engine coolant temperature sensor.
What are the symptoms of a P0128 code in a Nissan?
The most common symptom of a P0128 code is the check engine light coming on. Other symptoms may include poor fuel economy, reduced engine performance, and the engine taking longer to reach operating temperature.
How do I diagnose a P0128 code in my Nissan?
To diagnose a P0128 code, you will need to use an OBD-II scanner to read the code and determine the cause of the problem. You may also need to perform a visual inspection of the engine coolant system and test the thermostat and engine coolant temperature sensor.
Can I still drive my Nissan with a P0128 code?
You may be able to drive your Nissan with a P0128 code, but it is not recommended. The engine may not be operating at its optimal temperature, which can lead to reduced performance and increased wear and tear on the engine.
How do I fix a P0128 code in my Nissan?
The most common fix for a P0128 code is to replace the thermostat. In some cases, the engine coolant temperature sensor may also need to be replaced. It is recommended to have a professional mechanic diagnose and repair the issue to ensure proper repair and prevent further damage to the engine.
Learn about more p codes in Nissan here.
