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P0128 2010 Nissan Altima Sedan Code - Thermostat Function

Quick Answer

The P0128 code on a 2010 Nissan Altima Sedan indicates a problem with the thermostat function in the vehicle's cooling system. Common causes include Faulty thermostat, Low coolant level, Air pockets in the cooling system. 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 2010 Nissan Altima Sedan indicates Thermostat Function.
Common causes
Common causes include Faulty thermostat, Low coolant level, Air pockets in the cooling system.
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 11, 2024
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Code P0128 2010 Nissan Altima Sedan Description

The P0128 code on a 2010 Nissan Altima Sedan indicates a problem with the thermostat function in the vehicle's cooling system. The thermostat is a crucial component that regulates the engine's operating temperature by controlling the flow of coolant through the engine. When the thermostat fails to function properly, it can lead to overheating or undercooling of the engine, causing potential damage to the engine components and decreased performance.

OBDII Code P0128 2010 Nissan Altima Sedan - Thermostat Function
P0128 2010 Nissan Altima Sedan Code - Thermostat Function

Common Causes of P0128 2010 Nissan Altima Sedan

  1. Faulty thermostat
  2. Low coolant level
  3. Air pockets in the cooling system
  4. Defective coolant temperature sensor
  5. Wiring issues in the coolant temperature sensor circuit

Symptoms of P0128 2010 Nissan Altima Sedan

  1. Engine running colder or hotter than normal
  2. Decreased fuel efficiency
  3. Check Engine Light illuminated
  4. Engine overheating
  5. Poor heater performance

How to Fix P0128 2010 Nissan Altima Sedan

  1. Confirm the code: Use an OBD-II scanner to confirm the P0128 code and verify the thermostat malfunction.
  2. Inspect the cooling system: Check for leaks, low coolant levels, or air pockets in the cooling system.
  3. Replace the thermostat: Replace the faulty thermostat with a new one to restore proper temperature regulation.
  4. Clear the code: Clear the code from the ECM's memory using the OBD-II scanner.
  5. Test drive: Test drive the vehicle to ensure that the issue has been resolved and that the engine reaches the proper operating temperature.

Cost to Fix P0128 2010 Nissan Altima Sedan

The cost of repairing a thermostat issue like the P0128 code on a 2010 Nissan Altima Sedan can vary depending on the specific problem and the cost of parts and labor in your area. Generally, replacing a thermostat can range from $150 to $300, including parts and labor. Additional costs may apply if there are other related issues in the cooling system that need to be addressed. It's recommended to consult with a professional mechanic to get an accurate estimate based on your vehicle's specific needs and location. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on various factors.

What does this mean?

Tech Notes for P0128 2010 Nissan Altima Sedan

If cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem.

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 2010 Nissan Altima Sedan 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 2010 Nissan Altima Sedan Code

1. What does OBDII code P0128 on a 2010 Nissan Altima Sedan indicate?

This code indicates that the engine coolant temperature is below the thermostat regulating temperature.

2. What are the common symptoms of a P0128 code in a 2010 Nissan Altima Sedan?

Common symptoms include the engine running colder than normal, a slow-to-warm-up engine, reduced fuel efficiency, and a potential lack of heat inside the vehicle.

3. What are the possible causes of a P0128 code in a 2010 Nissan Altima Sedan?

Possible causes include a faulty thermostat, a malfunctioning coolant temperature sensor, low coolant levels, a stuck open thermostat, or a problem with the cooling system.

4. How can I diagnose the cause of a P0128 code in my 2010 Nissan Altima Sedan?

To diagnose the issue, you can start by checking the coolant level, testing the thermostat, inspecting the coolant temperature sensor, and ensuring the cooling system is functioning properly.

5. Can I continue driving my 2010 Nissan Altima Sedan with a P0128 code?

While it may be possible to drive the vehicle for a short distance with this code, it is recommended to address the issue promptly to prevent potential engine damage and ensure optimal performance.

6. How can I repair a P0128 code in my 2010 Nissan Altima Sedan?

Repairing a P0128 code typically involves replacing the thermostat, checking and topping up coolant levels, testing and potentially replacing the coolant temperature sensor, and ensuring the cooling system is functioning correctly.

7. Is it easy to replace the thermostat in a 2010 Nissan Altima Sedan?

Replacing the thermostat in a 2010 Nissan Altima Sedan can vary in difficulty depending on your mechanical skills and access to tools. It is recommended to follow a repair manual or seek professional help if unsure.

8. Will resetting the OBDII code P0128 in my 2010 Nissan Altima Sedan make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the P0128 code is not resolved, the code is likely to reappear after some driving cycles.

9. How much does it typically cost to repair a P0128 code in a 2010 Nissan Altima Sedan?

The cost of repairing a P0128 code can vary depending on the root cause of the issue, labor rates in your area, and whether you choose to do the repair yourself or take it to a mechanic. Expect costs for parts and labor.

10. Can a P0128 code in a 2010 Nissan Altima Sedan cause any long-term damage if left unaddressed?

Continuously driving with a P0128 code without addressing the underlying issue can potentially lead to reduced engine efficiency, increased wear on engine components, and in some cases, engine overheating. It is best to address the problem promptly.

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