AutoCodes – Nissan – P0128 2008 Nissan Maxima

P0128 2008 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 2008 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 7,111

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 2008 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 2008 Nissan Maxima - Thermostat Function - AutoCodes.com — P0128 2008 Nissan Maxima Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P0128 2008 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 2008 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 2008 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 2008 Nissan Maxima Code

1. What does OBDII code P0128 mean for a 2008 Nissan Maxima?

- OBDII code P0128 in a 2008 Nissan Maxima indicates a problem with the thermostat function, specifically that the engine is not reaching normal operating temperature within a specified time frame.

2. What are the common symptoms of a P0128 code in a 2008 Nissan Maxima?

- Common symptoms of a P0128 code in a 2008 Nissan Maxima may include the engine running cooler than normal, reduced fuel efficiency, and the check engine light being illuminated on the dashboard.

3. What are the possible causes of a P0128 code in a 2008 Nissan Maxima?

- Possible causes of a P0128 code in a 2008 Nissan Maxima include a faulty thermostat, low coolant level, a malfunctioning coolant temperature sensor, or a problem with the cooling system.

4. How do you diagnose a P0128 code in a 2008 Nissan Maxima?

- To diagnose a P0128 code in a 2008 Nissan Maxima, a mechanic would typically perform tests to check the thermostat operation, coolant level, coolant temperature sensor, and overall cooling system performance.

5. Can I continue driving my 2008 Nissan Maxima with a P0128 code?

- It is not recommended to continue driving your 2008 Nissan Maxima with a P0128 code, as it can lead to potential engine damage and decreased fuel efficiency. It's best to address the issue promptly.

6. How do you repair a P0128 code in a 2008 Nissan Maxima?

- Repairing a P0128 code in a 2008 Nissan Maxima usually involves replacing the thermostat, checking and topping up the coolant level, inspecting the coolant temperature sensor, and ensuring the cooling system is functioning properly.

7. What are the long-term effects of ignoring a P0128 code in a 2008 Nissan Maxima?

- Ignoring a P0128 code in a 2008 Nissan Maxima can result in poor engine performance, reduced fuel efficiency, overheating issues, and potential damage to engine components due to operating at incorrect temperatures.

8. Can a DIY enthusiast fix a P0128 code in a 2008 Nissan Maxima?

- While some aspects of addressing a P0128 code in a 2008 Nissan Maxima may be DIY-friendly, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper functioning of the cooling system.

9. How often does a thermostat need to be replaced in a 2008 Nissan Maxima?

- The thermostat in a 2008 Nissan Maxima typically does not need frequent replacement unless it becomes faulty. Regular maintenance checks can help identify any issues with the thermostat before they escalate.

10. Is the P0128 code a serious issue in a 2008 Nissan Maxima?

- The P0128 code in a 2008 Nissan Maxima should be taken seriously as it indicates a problem with the engine's ability to reach and maintain the correct operating temperature. Ignoring this code can lead to further complications and potential engine damage.