Engine-Codes.com
Engine-Codes – Nissan – P0128 2012 Nissan Altima Sedan

P0128 2012 Nissan Altima Sedan Code - Thermostat Function

Quick Answer

The P0128 code on a 2012 Nissan Altima Sedan indicates a potential issue with the thermostat function. 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 2012 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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0128 2012 Nissan Altima Sedan Description

The P0128 code on a 2012 Nissan Altima Sedan indicates a potential issue with the thermostat function. The thermostat is a crucial component of the vehicle's cooling system, responsible for regulating the engine's temperature by controlling the flow of coolant. When the thermostat fails or malfunctions, it can lead to serious consequences for the engine's performance and overall functionality.

OBDII Code P0128 2012 Nissan Altima Sedan - Thermostat Function
P0128 2012 Nissan Altima Sedan Code - Thermostat Function

Common Causes of P0128 2012 Nissan Altima Sedan

  1. Faulty thermostat
  2. Low coolant level
  3. Air pockets in the cooling system
  4. Coolant leaks
  5. Electrical issues with the thermostat sensor

Symptoms of P0128 2012 Nissan Altima Sedan

  1. Engine running hotter or cooler than normal
  2. Poor fuel efficiency
  3. Check engine light illuminated
  4. Heater not working properly
  5. Engine overheating

How to Fix P0128 2012 Nissan Altima Sedan

  1. Diagnostic: The first step in addressing the P0128 code is to perform a diagnostic to determine the exact cause of the issue. This may involve checking the thermostat, coolant level, cooling system for leaks, and the thermostat sensor.
  2. Thermostat Replacement: If the thermostat is found to be faulty, it will need to be replaced. This involves draining the coolant, removing the old thermostat, installing a new one, and refilling the coolant system.
  3. Coolant Flush: In some cases, it may be necessary to flush the coolant system to remove any contaminants or air pockets that could be affecting the thermostat's function.
  4. Check for Leaks: Checking for coolant leaks and repairing any damaged hoses or connections is essential to prevent future issues.
  5. Clear Codes: Once the repair is complete, the diagnostic trouble codes should be cleared from the vehicle's computer to reset the Check Engine Light.

Cost to Fix P0128 2012 Nissan Altima Sedan

The cost of repairing a thermostat issue on a 2012 Nissan Altima Sedan can vary depending on the specific cause of the problem and the labor rates in your area. On average, the cost of replacing a thermostat and performing a coolant flush can range from $200 to $400. Additional costs may apply if there are coolant leaks or other components that need to be replaced. It's recommended to consult with a trusted mechanic or dealership for a more accurate cost estimate based on your specific situation. Remember that labor rates at auto repair shops can vary significantly, so it's important to shop around for the best price.

What does this mean?

Tech Notes for P0128 2012 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 2012 Nissan Altima Sedan code?

Need more information on how to fix the P0128 2012 Nissan Altima Sedan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0128 2012 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area

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 2012 Nissan Altima Sedan Code

1. What does OBDII code P0128 on a 2012 Nissan Altima Sedan indicate?

- OBDII code P0128 in a 2012 Nissan Altima Sedan points to an issue with the thermostat function.

2. What are the common symptoms of a P0128 code in a 2012 Nissan Altima Sedan?

- Common symptoms of a P0128 code in a 2012 Nissan Altima Sedan include the engine running colder than normal, a decrease in fuel efficiency, and the Check Engine light illuminating.

3. What are the possible causes of a P0128 code in a 2012 Nissan Altima Sedan?

- Possible causes of a P0128 code in a 2012 Nissan Altima Sedan include a faulty thermostat, a malfunctioning coolant temperature sensor, or low coolant levels.

4. How can I diagnose the cause of a P0128 code in my 2012 Nissan Altima Sedan?

- To diagnose a P0128 code in a 2012 Nissan Altima Sedan, you can start by checking the coolant level, inspecting the thermostat for proper operation, and testing the coolant temperature sensor.

5. What are the potential dangers of ignoring a P0128 code in a 2012 Nissan Altima Sedan?

- Ignoring a P0128 code in a 2012 Nissan Altima Sedan can lead to overheating of the engine, which may cause severe damage and result in costly repairs.

6. Can I continue driving my 2012 Nissan Altima Sedan with a P0128 code?

- It is not recommended to continue driving your 2012 Nissan Altima Sedan with a P0128 code as it can lead to engine overheating and potential damage.

7. How much does it typically cost to repair a P0128 code in a 2012 Nissan Altima Sedan?

- The cost to repair a P0128 code in a 2012 Nissan Altima Sedan can vary depending on the exact cause, but it may range from $150 to $400 for parts and labor.

8. Is it possible to reset a P0128 code in a 2012 Nissan Altima Sedan without fixing the underlying issue?

- While you can clear the code temporarily, the Check Engine light is likely to reappear until the root cause of the P0128 code is addressed.

9. Are there any preventative maintenance tips to avoid a P0128 code in a 2012 Nissan Altima Sedan?

- Regularly checking and maintaining the coolant level, replacing the thermostat at recommended intervals, and ensuring the cooling system is in good condition can help prevent a P0128 code in your 2012 Nissan Altima Sedan.

10. Can a DIY enthusiast repair a P0128 code in a 2012 Nissan Altima Sedan?

- Depending on your mechanical skills and tools available, DIY enthusiasts may be able to replace a faulty thermostat or coolant temperature sensor to address a P0128 code in a 2012 Nissan Altima Sedan. However, it's recommended to consult a professional if unsure.

Discuss the causes and fixes for P0128 2012 Nissan Altima Sedan OBDII Code

Submit a New Comment

Code P0128 2012 Nissan Altima Sedan comments

No comments found for this page.