AutoCodes – Nissan – P0128 2006 Nissan Pathfinder

P0128 2006 Nissan Pathfinder 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 Pathfinder 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 6,188

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 2006 Nissan Pathfinder 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 Pathfinder - Thermostat Function - AutoCodes.com — P0128 2006 Nissan Pathfinder Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2006 Nissan Pathfinder?

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 Pathfinder?

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 Pathfinder 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 Pathfinder 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 Pathfinder Code

1. What does OBDII code P0128 mean for a 2006 Nissan Pathfinder?

The P0128 code indicates that the engine coolant temperature is below the thermostat regulating temperature.

2. What are common symptoms of a P0128 code in a 2006 Nissan Pathfinder?

Common symptoms include decreased fuel efficiency, higher than normal engine temperature, and the heater not working properly.

3. What are the potential causes of a P0128 code in a 2006 Nissan Pathfinder?

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

4. How serious is a P0128 code in a 2006 Nissan Pathfinder?

While the vehicle may still be driveable with a P0128 code, it is important to address the issue promptly to prevent potential engine damage from overheating.

5. How can I diagnose a P0128 code in a 2006 Nissan Pathfinder?

Diagnosing a P0128 code typically involves checking the coolant level, testing the thermostat, inspecting the coolant temperature sensor, and examining the overall condition of the cooling system.

6. Can I repair a P0128 code in a 2006 Nissan Pathfinder myself?

If you have the necessary tools and experience, you may be able to replace the thermostat or coolant temperature sensor yourself. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. How much does it cost to repair a P0128 code in a 2006 Nissan Pathfinder?

The cost of repairing a P0128 code can vary depending on the exact cause of the issue and whether you perform the repairs yourself or take your vehicle to a mechanic. Costs may range from a simple thermostat replacement to more complex cooling system repairs.

8. What are some tips for preventing a P0128 code in a 2006 Nissan Pathfinder?

Regularly checking coolant levels, performing routine maintenance on the cooling system, and addressing any overheating issues promptly can help prevent the occurrence of a P0128 code.

9. Can a P0128 code in a 2006 Nissan Pathfinder cause further damage if left unrepaired?

If left unrepaired, a P0128 code can lead to potential engine damage due to overheating, decreased fuel efficiency, and other related issues. It is important to address the code promptly to prevent further damage.

10. How long can I drive with a P0128 code in a 2006 Nissan Pathfinder?

While you may be able to drive for a short period with a P0128 code, it is recommended to address the issue as soon as possible to prevent any potential damage to the engine or cooling system.