Engine-Codes - Nissan - P0128 2012 NISSAN ALTIMA SEDAN

P0128 2012 NISSAN ALTIMA SEDAN Code - Thermostat Function

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

|P0128 2012 NISSAN ALTIMA SEDAN code 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 is the P0128 2012 NISSAN ALTIMA SEDAN code repair?

Start by checking 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.

|P0128 2012 NISSAN ALTIMA SEDAN 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 P0128 2012 NISSAN ALTIMA SEDAN code

Labor: 1.0

The cost to diagnose the P0128 2012 NISSAN ALTIMA SEDAN code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0128 2012 NISSAN ALTIMA SEDAN code detected?

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

|What are P0128 2012 NISSAN ALTIMA SEDAN code possible symptoms?

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

|What is P0128 2012 NISSAN ALTIMA SEDAN code 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.

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