AutoCodes – Nissan – P0128 2006 Nissan Altima Sedan

P0128 2006 Nissan Altima Sedan 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 2006 Nissan Altima Sedan 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 8,190

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 Mar 30, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0128 2006 Nissan Altima Sedan 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 2006 Nissan Altima Sedan - Thermostat Function - AutoCodes.com — P0128 2006 Nissan Altima Sedan Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2006 Nissan Altima Sedan?

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 2006 Nissan Altima Sedan?

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 2006 Nissan Altima Sedan 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 2006 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 2006 Nissan Altima Sedan Code

1. What does OBDII code P0128 on a 2006 Nissan Altima Sedan indicate?

The code P0128 in a 2006 Nissan Altima Sedan typically points to an issue with the thermostat function.

2. What are the common symptoms of a P0128 code in a 2006 Nissan Altima Sedan?

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

3. What are the possible causes of a P0128 code in a 2006 Nissan Altima Sedan?

The most common causes of a P0128 code are a malfunctioning thermostat, low coolant levels, a faulty coolant temperature sensor, or a problem with the cooling system.

4. How can I diagnose the cause of a P0128 code in my 2006 Nissan Altima Sedan?

To diagnose a P0128 code, you can start by checking the coolant level, inspecting the thermostat for proper operation, testing the coolant temperature sensor, and ensuring there are no leaks in the cooling system.

5. Can I continue driving my 2006 Nissan Altima Sedan with a P0128 code?

It is not recommended to drive your vehicle with a P0128 code for an extended period as it can lead to overheating and potentially cause damage to the engine.

6. How do I repair a P0128 code in my 2006 Nissan Altima Sedan?

To repair a P0128 code, you may need to replace the thermostat, top up coolant levels, replace the coolant temperature sensor, or address any leaks in the cooling system.

7. Are there any DIY tips for fixing a P0128 code in a 2006 Nissan Altima Sedan?

While some simple tasks like checking coolant levels can be done DIY, it's advisable to consult a professional mechanic for diagnosing and repairing the underlying issue causing the P0128 code.

8. How much does it cost to repair a P0128 code in a 2006 Nissan Altima Sedan?

The cost of repairing a P0128 code can vary depending on the cause and the specific parts that need to be replaced. It's recommended to get a few quotes from mechanics to compare prices.

9. Can a P0128 code in a 2006 Nissan Altima Sedan be triggered by a faulty thermostat alone?

Yes, a faulty thermostat is one of the primary reasons for a P0128 code in a 2006 Nissan Altima Sedan as it can cause the engine to run cooler than the optimal temperature.

10. How often should I replace the thermostat in my 2006 Nissan Altima Sedan to prevent a P0128 code?

Thermostats typically last for several years, but it's a good idea to replace it as part of regular maintenance every 60,000 to 100,000 miles to prevent issues like the P0128 code from occurring.