Engine-Codes - Nissan - P0125 2009 NISSAN SENTRA

P0125 2009 NISSAN SENTRA - Engine Coolant Temperature Sensor

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

P0125 2009 NISSAN SENTRA Possible Causes

  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty Engine Coolant Temperature (ECT) sensor
  • Engine Coolant Temperature (ECT) sensor harness is open or shorted
  • Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

How is the P0125 2009 NISSAN SENTRA 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.

Tech Notes

Check for coolant leaks first, if there are no leaks check to see if thermostat is opening and closing properly if its not replace thermostat if problem is still there coolant temperature sensor may need to be replaced.

What is the cost to diagnose the P0125 2009 NISSAN SENTRA code

Labor: 1.0

The cost to diagnose the P0125 2009 NISSAN SENTRA 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.
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When is the code detected?

The voltage sent to Engine Control Module (ECM) from the Engine Coolant Temperature (ECT) sensor is not practical, even when some time has passed after starting the engine. The engine is taking too long to reach the normal temperature level.

Possible Symptoms

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

P0125 2009 NISSAN SENTRA Meaning

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

More Information

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