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P0117 2012 Nissan Pathfinder Code - Engine Coolant Temperature Circuit Low

Quick Answer

The P0117 code for a 2012 Nissan Pathfinder indicates a problem with the Engine Coolant Temperature (ECT) Circuit being lower than the expected range. Common causes include Faulty ECT sensor, Corroded or damaged ECT wiring harness, Malfunctioning ECM. 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
P0117 2012 Nissan Pathfinder indicates Engine Coolant Temperature Circuit Low.
Common causes
Common causes include Faulty ECT sensor, Corroded or damaged ECT wiring harness, Malfunctioning ECM.
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 14, 2024
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Code P0117 2012 Nissan Pathfinder Description

The P0117 code for a 2012 Nissan Pathfinder indicates a problem with the Engine Coolant Temperature (ECT) Circuit being lower than the expected range. The ECT sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing to ensure optimal engine performance and efficiency.

OBDII Code P0117 2012 Nissan Pathfinder - Engine Coolant Temperature Circuit Low
P0117 2012 Nissan Pathfinder Code - Engine Coolant Temperature Circuit Low

Common Causes of P0117 2012 Nissan Pathfinder

  1. Faulty ECT sensor
  2. Corroded or damaged ECT wiring harness
  3. Malfunctioning ECM
  4. Cooling system issues such as low coolant levels or a faulty thermostat
  5. Electrical issues such as a short circuit in the ECT circuit

Symptoms of P0117 2012 Nissan Pathfinder

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

How to Fix P0117 2012 Nissan Pathfinder

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to read the ECT sensor data and check for any faults.
  2. Inspect the ECT sensor and wiring harness for any signs of damage or corrosion. Replace the sensor if necessary and repair any damaged wiring.
  3. Check the coolant levels and the condition of the cooling system components. Top up coolant if low and replace the thermostat if faulty.
  4. Clear the diagnostic trouble codes from the ECM using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other components.

Cost to Fix P0117 2012 Nissan Pathfinder

The typical repair costs for addressing a P0117 code on a 2012 Nissan Pathfinder can vary depending on the specific cause of the issue. In general, replacing a faulty ECT sensor can cost between $50 to $150, while repairing damaged wiring or replacing the thermostat can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, but rates can vary based on location and the shop's expertise. It's advisable to consult with a professional mechanic to get an accurate estimate for the repair.

What does this mean?

Tech Notes for P0117 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 low 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 P0117 2012 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0117 in a 2012 Nissan Pathfinder?

- Common symptoms include inaccurate temperature gauge readings, engine overheating, poor fuel economy, and potential stalling.

2. What are the possible causes of the OBDII code P0117 in a 2012 Nissan Pathfinder?

- Possible causes include a faulty engine coolant temperature (ECT) sensor, damaged wiring or connectors, low coolant levels, or a malfunctioning thermostat.

3. How can I diagnose the OBDII code P0117 in my 2012 Nissan Pathfinder?

- Diagnose by checking the ECT sensor's resistance, inspecting the wiring for damage, verifying coolant levels, testing the thermostat, and scanning for any related trouble codes.

4. Can a faulty thermostat trigger the OBDII code P0117 in a 2012 Nissan Pathfinder?

- Yes, a malfunctioning thermostat can cause incorrect engine coolant temperature readings, which may trigger the P0117 code.

5. How do I repair the OBDII code P0117 in my 2012 Nissan Pathfinder?

- Repair involves replacing the faulty ECT sensor, repairing or replacing damaged wiring or connectors, ensuring proper coolant levels, and addressing any thermostat issues.

6. Is it safe to continue driving with the OBDII code P0117 in a 2012 Nissan Pathfinder?

- It is not recommended to drive with the P0117 code as it can lead to engine overheating and other potential issues. Address the problem promptly.

7. Can a simple reset of the OBDII system clear the P0117 code in a 2012 Nissan Pathfinder?

- A reset may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear. It's important to diagnose and repair the root cause.

8. Will a low coolant level always trigger the OBDII code P0117 in a 2012 Nissan Pathfinder?

- While low coolant levels can be a cause, other factors like a faulty ECT sensor or wiring issues can also trigger the P0117 code.

9. How do I ensure the accurate functioning of the ECT sensor in a 2012 Nissan Pathfinder?

- Regularly check and maintain coolant levels, inspect for any leaks, ensure proper sensor wiring connections, and replace the ECT sensor if needed.

10. Can extreme weather conditions affect the OBDII code P0117 in a 2012 Nissan Pathfinder?

- Yes, extreme temperatures can impact the ECT sensor's readings and potentially trigger the P0117 code. Ensure proper insulation and protection in harsh conditions.

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