AutoCodes – Infiniti – P0128 2006 Infiniti G35

P0128 2006 Infiniti G35 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 Infiniti G35 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 5,803

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 Infiniti G35 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 Infiniti G35 - Thermostat Function - AutoCodes.com — P0128 2006 Infiniti G35 Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2006 Infiniti G35?

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 Infiniti G35?

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 Infiniti G35 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 2006 Infiniti G35 Code

1. What does OBDII code P0128 on a 2006 Infiniti G35 indicate?

The OBDII code P0128 on a 2006 Infiniti G35 indicates an issue with the thermostat function, specifically related to the engine coolant temperature being below the thermostat regulating temperature.

2. What are the common symptoms of a P0128 code on a 2006 Infiniti G35?

Common symptoms of a P0128 code on a 2006 Infiniti G35 include the engine running cooler than normal, poor fuel economy, illuminated check engine light, and a decrease in heater performance.

3. What are the possible causes of a P0128 code on a 2006 Infiniti G35?

Possible causes of a P0128 code on a 2006 Infiniti G35 include a faulty thermostat, low coolant level, a malfunctioning coolant temperature sensor, or a problem with the cooling system.

4. How can I diagnose a P0128 code on a 2006 Infiniti G35?

To diagnose a P0128 code on a 2006 Infiniti G35, 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 Infiniti G35 with a P0128 code?

It is not recommended to continue driving your 2006 Infiniti G35 with a P0128 code as it can lead to potential engine damage due to inefficient temperature regulation. It is best to address the issue promptly.

6. How much does it cost to repair a P0128 code on a 2006 Infiniti G35?

The cost of repairing a P0128 code on a 2006 Infiniti G35 can vary depending on the exact cause of the issue. It may range from $150 to $400, including parts and labor.

7. Can I repair a P0128 code on a 2006 Infiniti G35 myself?

Repairing a P0128 code on a 2006 Infiniti G35 can be done yourself if you have the necessary tools and mechanical knowledge. However, it is recommended to consult a professional if you are unsure about the diagnosis or repair process.

8. How often does the thermostat need to be replaced in a 2006 Infiniti G35?

The thermostat in a 2006 Infiniti G35 typically does not need to be replaced often unless there is a malfunction. It is a good idea to inspect the thermostat during regular maintenance to ensure proper function.

9. Will resetting the check engine light fix a P0128 code on a 2006 Infiniti G35?

Simply resetting the check engine light will not fix a P0128 code on a 2006 Infiniti G35. The underlying issue causing the code must be diagnosed and repaired for the light to stay off.

10. How important is it to address a P0128 code promptly on a 2006 Infiniti G35?

It is essential to address a P0128 code promptly on a 2006 Infiniti G35 to prevent potential engine damage, maintain optimal fuel efficiency, and ensure proper performance of the vehicle's heating system.