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P0118 2012 Nissan Pathfinder Code - Engine Coolant Temperature Sensor Circuit High

Quick Answer

The P0118 code for a 2012 Nissan Pathfinder indicates a problem with the Engine Coolant Temperature (ECT) Sensor Circuit registering a high voltage. Common causes include Faulty ECT sensor, Wiring issues or a poor connection in the ECT sensor circuit, Corrosion or damage to the ECT sensor connector. 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
P0118 2012 Nissan Pathfinder indicates Engine Coolant Temperature Sensor Circuit High.
Common causes
Common causes include Faulty ECT sensor, Wiring issues or a poor connection in the ECT sensor circuit, Corrosion or damage to the ECT sensor connector.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0118 2012 Nissan Pathfinder Description

The P0118 code for a 2012 Nissan Pathfinder indicates a problem with the Engine Coolant Temperature (ECT) Sensor Circuit registering a high voltage. The ECT sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). When the ECM detects a high voltage signal from the ECT sensor, it triggers the P0118 code.

OBDII Code P0118 2012 Nissan Pathfinder - Engine Coolant Temperature Sensor Circuit High
P0118 2012 Nissan Pathfinder Code - Engine Coolant Temperature Sensor Circuit High

Common Causes of P0118 2012 Nissan Pathfinder

  1. Faulty ECT sensor
  2. Wiring issues or a poor connection in the ECT sensor circuit
  3. Corrosion or damage to the ECT sensor connector
  4. Coolant level or quality issues affecting the ECT sensor readings
  5. ECM software or hardware problems

Symptoms of P0118 2012 Nissan Pathfinder

  1. Check Engine Light illuminated on the dashboard
  2. Engine overheating or running hotter than normal
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Difficulty starting the engine

How to Fix P0118 2012 Nissan Pathfinder

  1. Begin by diagnosing the ECT sensor using a multimeter to test for proper resistance and voltage readings.
  2. Inspect the wiring and connectors in the ECT sensor circuit for any damage, corrosion, or loose connections.
  3. If the ECT sensor is faulty, replace it with a new sensor following the manufacturer's guidelines.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and monitor the system to ensure the code does not return.
  5. Test drive the vehicle to verify that the issue has been resolved and that the engine is operating within the correct temperature range.

Cost to Fix P0118 2012 Nissan Pathfinder

The cost of repairing a P0118 code on a 2012 Nissan Pathfinder can vary depending on the specific cause of the issue. In general, the price of a new ECT sensor ranges from $20 to $100, depending on the brand and quality. Labor costs for this repair can range from $80 to $150 per hour, with the total repair time typically taking around 1-2 hours. Therefore, the total cost of repairing a P0118 code could range from $100 to $400, including parts and labor. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for P0118 2012 Nissan Pathfinder

If the coolant level is low, add coolant and reset the code. If the car is overheating the thermostat may have to be replaced. If the problem continues the engine coolant temperature (ECT) sensor.

When is the Code Detected?

An excessively high voltage from the sensor is sent to ECM.

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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 P0118 2012 Nissan Pathfinder Code

1. What does OBDII code P0118 on a 2012 Nissan Pathfinder mean?

The code P0118 indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit, specifically that the sensor is reading a high voltage signal.

2. What are the common symptoms of a P0118 code on a 2012 Nissan Pathfinder?

Common symptoms include the engine running hotter than normal, poor fuel economy, rough idling, and potentially the Check Engine light being illuminated on the dashboard.

3. What are the possible causes of a P0118 code on a 2012 Nissan Pathfinder?

Potential causes include a faulty ECT sensor, a damaged sensor wiring harness, a coolant leak affecting the sensor, or issues with the engine control module (ECM).

4. How can I diagnose the cause of a P0118 code on my 2012 Nissan Pathfinder?

Diagnosing the issue involves checking the ECT sensor's resistance, inspecting the wiring for damage, verifying coolant levels and condition, and using a scan tool to monitor sensor readings.

5. Can I still drive my 2012 Nissan Pathfinder with a P0118 code?

It's not recommended to continue driving with a P0118 code, as it can lead to potential overheating issues and engine damage. It's best to address the problem promptly.

6. How do I repair a P0118 code on my 2012 Nissan Pathfinder?

Repairing the P0118 code typically involves replacing the faulty ECT sensor, repairing or replacing damaged wiring, ensuring proper coolant levels, and clearing the code with a scan tool.

7. Can a P0118 code on a 2012 Nissan Pathfinder cause other problems?

Yes, a P0118 code can potentially cause issues like poor engine performance, increased emissions, and in extreme cases, engine overheating leading to more severe damage.

8. How much does it cost to fix a P0118 code on a 2012 Nissan Pathfinder?

The cost of fixing a P0118 code can vary depending on the exact cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

9. Is it possible to prevent a P0118 code from occurring on my 2012 Nissan Pathfinder?

Regular maintenance, such as checking coolant levels, inspecting the ECT sensor and wiring harness for damage, and addressing any cooling system issues promptly, can help prevent a P0118 code.

10. How long does it take to fix a P0118 code on a 2012 Nissan Pathfinder?

The repair time for a P0118 code can vary based on the specific cause of the issue and the expertise of the technician, but it usually takes anywhere from 1 to 2 hours to complete the repair.

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