AutoCodes – Nissan – P0118 2012 Nissan Sentra

P0118 2012 Nissan Sentra 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 2012 Nissan Sentra 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 6,573

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0118 2012 Nissan Sentra 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 2012 Nissan Sentra - Engine Coolant Temperature Sensor Circuit High - AutoCodes.com — P0118 2012 Nissan Sentra Code - Engine Coolant Temperature Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P0118 2012 Nissan Sentra?

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 2012 Nissan Sentra?

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.

What does this mean?

Code 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 Code?

Labor: 1.0

To diagnose the P0118 2012 Nissan Sentra 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 2012 Nissan Sentra 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 2012 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0118 in a 2012 Nissan Sentra?

The common symptoms include the engine overheating, a decrease in fuel efficiency, rough idling, and the temperature gauge showing abnormally high readings.

2. What causes the OBDII code P0118 in a 2012 Nissan Sentra?

The most common cause of the P0118 code in a 2012 Nissan Sentra is a faulty engine coolant temperature (ECT) sensor or a problem with the ECT sensor circuit.

3. How can I diagnose the issue causing the OBDII code P0118 in my 2012 Nissan Sentra?

You can diagnose the issue by checking the ECT sensor for proper operation, inspecting the sensor wiring for damage or loose connections, and testing the coolant temperature sensor circuit for continuity.

4. Can a bad thermostat trigger the OBDII code P0118 in a 2012 Nissan Sentra?

Yes, a malfunctioning thermostat can potentially cause the engine coolant temperature to rise too high, triggering the P0118 code in your 2012 Nissan Sentra.

5. Is it safe to continue driving my 2012 Nissan Sentra with the OBDII code P0118 active?

It is not recommended to drive your vehicle with the P0118 code active, as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

6. How do I reset the OBDII code P0118 in my 2012 Nissan Sentra after making repairs?

You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes. However, the code may return if the underlying issue is not fixed.

7. Can a dirty or low coolant level trigger the OBDII code P0118 in a 2012 Nissan Sentra?

Yes, low coolant levels or dirty coolant can affect the ECT sensor's readings and potentially trigger the P0118 code in your 2012 Nissan Sentra.

8. What are some DIY repair tips for fixing the OBDII code P0118 in a 2012 Nissan Sentra?

DIY repair tips include checking and cleaning the ECT sensor, inspecting the sensor wiring for damage, ensuring proper coolant levels, and testing the thermostat for proper operation.

9. How much does it typically cost to repair the OBDII code P0118 in a 2012 Nissan Sentra at a mechanic or dealership?

The cost of repairing the P0118 code can vary depending on the exact cause of the issue. It may range from $100 to $300 for parts and labor at a mechanic or dealership.

10. Can a faulty ECU (Engine Control Unit) cause the OBDII code P0118 in a 2012 Nissan Sentra?

While it's less common, a malfunctioning ECU can potentially cause erroneous readings from the ECT sensor, leading to the activation of the P0118 code in your 2012 Nissan Sentra.