Engine-Codes - Nissan - P0128 2009 NISSAN PATHFINDER

P0128 2009 NISSAN PATHFINDER - Thermostat Function

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0128 2009 NISSAN PATHFINDER Possible Causes

  • 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 do I fix code P0128 2009 NISSAN PATHFINDER?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

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

Cost of diagnosing the P0128 2009 NISSAN PATHFINDER code

Labor: 1.0

The cost of diagnosing the P0128 2009 NISSAN PATHFINDER code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0128 2009 NISSAN PATHFINDER Meaning

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.

P0128 2009 NISSAN PATHFINDER More Information

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