AutoCodesNissan – P0118 2007 Nissan Pathfinder

P0118 2007 Nissan Pathfinder Code - Engine Coolant Temperature Sensor Circuit High

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat. 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 2007 Nissan Pathfinder indicates Engine Coolant Temperature Sensor Circuit High.
Common causes
Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat.
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.
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Code Popularity 8,253
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0118 2007 Nissan Pathfinder Description

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.
OBDII Code P0118 2007 Nissan Pathfinder - Engine Coolant Temperature Sensor Circuit High - AutoCodes.com
P0118 2007 Nissan Pathfinder Code - Engine Coolant Temperature Sensor Circuit High

What are the Possible Causes of the DTC P0118 2007 Nissan Pathfinder?

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

How to Fix the DTC P0118 2007 Nissan Pathfinder?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2007 Nissan Pathfinder code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0118 2007 Nissan Pathfinder code?

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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 2007 Nissan Pathfinder Code

1. What does the OBDII code P0118 mean on a 2007 Nissan Pathfinder?

P0118 indicates a high voltage issue in the Engine Coolant Temperature (ECT) sensor circuit, meaning the sensor is reading abnormally high or is disconnected.

2. What are the symptoms of code P0118 in a 2007 Nissan Pathfinder?

Common symptoms include poor fuel economy, difficulty starting the engine, rough idle, engine overheating, or the cooling fan running constantly.

3. What causes the P0118 code to appear on a 2007 Nissan Pathfinder?

Possible causes include a faulty ECT sensor, damaged or corroded wiring, a loose connector, or an issue with the vehicle’s Engine Control Module (ECM).

4. Can I drive my 2007 Nissan Pathfinder with the P0118 code?

It’s not recommended. Driving with this code can lead to poor engine performance, increased emissions, or potential overheating, which could damage the engine.

5. How do I diagnose the P0118 code on my 2007 Nissan Pathfinder?

Start by inspecting the ECT sensor and its wiring for damage or corrosion, checking for loose connections, and using a multimeter to measure sensor resistance.

6. How do I fix the P0118 code on a 2007 Nissan Pathfinder?

Common fixes include replacing the faulty ECT sensor, repairing or replacing damaged wiring, cleaning corroded connections, or updating or reprogramming the ECM if necessary.

7. Where is the Engine Coolant Temperature (ECT) sensor located on a 2007 Nissan Pathfinder?

The ECT sensor is typically located near the thermostat housing on the engine block.

8. How much does it cost to repair the P0118 code on a 2007 Nissan Pathfinder?

Repair costs vary but typically range from $50 to $200, depending on whether the issue is with the sensor, wiring, or ECM.

9. Will clearing the P0118 code fix the problem on my 2007 Nissan Pathfinder?

Clearing the code won’t fix the underlying issue. You need to identify and resolve the cause of the high voltage reading in the ECT sensor circuit to prevent the code from returning.

10. Can a faulty thermostat trigger the P0118 code on a 2007 Nissan Pathfinder?

While unlikely, a stuck thermostat causing irregular coolant flow could indirectly affect the ECT sensor readings, contributing to the issue.

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