AutoCodes – Nissan – P0128 2005 Nissan Maxima

P0128 2005 Nissan Maxima 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 2005 Nissan Maxima 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 8,307

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 2005 Nissan Maxima 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 2005 Nissan Maxima - Thermostat Function - AutoCodes.com — P0128 2005 Nissan Maxima Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2005 Nissan Maxima?

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 2005 Nissan Maxima?

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

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0128 2005 Nissan Maxima 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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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 2005 Nissan Maxima Code

1. What does OBDII code P0128 on a 2005 Nissan Maxima indicate?

- Code P0128 on a 2005 Nissan Maxima typically indicates a problem with the thermostat function.

2. What are the common symptoms of a P0128 code in a 2005 Nissan Maxima?

- Common symptoms include the engine running cooler than normal, a decrease in fuel efficiency, and the temperature gauge not reaching the normal operating level.

3. What are the possible causes of a P0128 code in a 2005 Nissan Maxima?

- The main causes of a P0128 code in a 2005 Nissan Maxima are a faulty thermostat, a malfunctioning engine coolant temperature sensor, or low coolant levels.

4. How can I diagnose a P0128 code in my 2005 Nissan Maxima?

- To diagnose a P0128 code, you can start by checking the coolant level, testing the thermostat, and inspecting the engine coolant temperature sensor for any signs of damage or malfunction.

5. Can I continue driving my 2005 Nissan Maxima with a P0128 code?

- It is not recommended to continue driving with a P0128 code, as it can lead to potential engine damage and reduced fuel efficiency. It is best to address the issue promptly.

6. How do I repair a P0128 code on my 2005 Nissan Maxima?

- To repair a P0128 code, you may need to replace the thermostat, engine coolant temperature sensor, or address any coolant leaks. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. Are there any DIY tips for fixing a P0128 code on a 2005 Nissan Maxima?

- While basic checks like inspecting coolant levels can be done DIY, it is advisable to seek professional assistance for diagnosing and repairing the underlying issue causing the P0128 code.

8. What is the purpose of the thermostat in a 2005 Nissan Maxima?

- The thermostat in a 2005 Nissan Maxima regulates the engine's operating temperature by controlling the flow of coolant through the engine, ensuring optimal performance and efficiency.

9. Can a P0128 code affect the performance of my 2005 Nissan Maxima?

- Yes, a P0128 code can affect the performance of your 2005 Nissan Maxima by causing the engine to run at a lower temperature than ideal, leading to decreased fuel efficiency and potential engine issues.

10. How much does it cost to repair a P0128 code on a 2005 Nissan Maxima?

- The cost of repairing a P0128 code on a 2005 Nissan Maxima can vary depending on the specific issue causing the code, but it typically ranges from $150 to $400 for parts and labor.