AutoCodes – Nissan – P0128 2011 Nissan Sentra

P0128 2011 Nissan Sentra Code - Thermostat Function

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 Leaking or stuck open thermostat, Low engine coolant level, Insufficient warm up time. 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 2011 Nissan Sentra indicates Thermostat Function.
Common causes: Common causes include Leaking or stuck open thermostat, Low engine coolant level, Insufficient warm up time.
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.

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Code Popularity 4,747

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 21, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0128 2011 Nissan Sentra Description

The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. When the engine is cold, no coolant flows through the engine. Once the engine reaches its operating temperature, the thermostat opens. The OBDII sets when the engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough. This is due to a leak in the seal or the thermostat open stuck.

OBDII Code P0128 2011 Nissan Sentra - Thermostat Function - AutoCodes.com — P0128 2011 Nissan Sentra Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2011 Nissan Sentra?

Leaking or stuck open thermostat
Low engine coolant level
Insufficient warm up time
Faulty engine coolant temperature sensor
Engine coolant temperature sensor harness is open or shorted
Engine coolant temperature sensor circuit poor electrical connection

How to Fix the DTC P0128 2011 Nissan Sentra?

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.

What does this mean?

Code Tech Notes

Check for coolant leaks first, if there are no leaks check to see if thermostat is opening and closing properly if its not replace thermostat if problem is still there coolant temperature sensor may need to be replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0128 2011 Nissan Sentra 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.

Need more information about the P0128 2011 Nissan Sentra 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 2011 Nissan Sentra Code

1. What is the P0128 OBDII code for a 2011 Nissan Sentra?

- The P0128 code on a 2011 Nissan Sentra indicates a problem with the thermostat function.

2. What are the common symptoms of a P0128 code in a 2011 Nissan Sentra?

- Common symptoms of a P0128 code may include the engine running colder than normal, poor fuel economy, and the check engine light illuminating.

3. What are the possible causes of a P0128 code in a 2011 Nissan Sentra?

- The P0128 code in a 2011 Nissan Sentra is often caused by a malfunctioning thermostat, low coolant level, a faulty coolant temperature sensor, or a problem with the cooling system.

4. How can I diagnose a P0128 code in my 2011 Nissan Sentra?

- Diagnosing a P0128 code in a 2011 Nissan Sentra involves checking the coolant level, testing the thermostat, inspecting the coolant temperature sensor, and examining the cooling system for any leaks or issues.

5. Can I still drive my 2011 Nissan Sentra with a P0128 code?

- It is not recommended to drive your 2011 Nissan Sentra with a P0128 code, as it can lead to overheating and potential engine damage. It is best to address the issue promptly.

6. How can I repair a P0128 code in my 2011 Nissan Sentra?

- Repairing a P0128 code in a 2011 Nissan Sentra typically involves replacing the thermostat, topping up coolant if needed, checking and replacing the coolant temperature sensor if faulty, and ensuring the cooling system is functioning properly.

7. Will resetting the error codes make the P0128 code go away in my 2011 Nissan Sentra?

- Resetting the error codes may temporarily clear the P0128 code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.

8. How much does it cost to repair a P0128 code in a 2011 Nissan Sentra?

- The cost of repairing a P0128 code in a 2011 Nissan Sentra can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix a P0128 code in a 2011 Nissan Sentra?

- Some aspects of diagnosing and repairing a P0128 code in a 2011 Nissan Sentra can be done by a DIY enthusiast, such as checking coolant levels or replacing the thermostat. However, more complex issues may require professional help.

10. How often should the thermostat be replaced in a 2011 Nissan Sentra to prevent a P0128 code?

- The thermostat in a 2011 Nissan Sentra should be replaced as part of regular maintenance or if any issues arise. It is recommended to follow the manufacturer's guidelines for thermostat replacement intervals to avoid triggering a P0128 code.