AutoCodes – Nissan – P0118 2009 Nissan Sentra

P0118 2009 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 2009 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 5,073

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 2009 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 2009 Nissan Sentra - Engine Coolant Temperature Sensor Circuit High - AutoCodes.com — P0118 2009 Nissan Sentra Code - Engine Coolant Temperature Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P0118 2009 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 2009 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 2009 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 2009 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 2009 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0118 on a 2009 Nissan Sentra?

The common symptoms of OBDII code P0118 on a 2009 Nissan Sentra include engine overheating, rough idling, poor fuel economy, and a temperature gauge reading that is higher than normal.

2. What does OBDII code P0118 indicate on a 2009 Nissan Sentra?

OBDII code P0118 on a 2009 Nissan Sentra indicates a high voltage signal from the Engine Coolant Temperature (ECT) sensor circuit.

3. What are the possible causes of OBDII code P0118 on a 2009 Nissan Sentra?

Possible causes of OBDII code P0118 on a 2009 Nissan Sentra include a faulty ECT sensor, a short or open circuit in the sensor wiring, a corroded connector, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose the cause of OBDII code P0118 on my 2009 Nissan Sentra?

To diagnose the cause of OBDII code P0118 on a 2009 Nissan Sentra, you can start by checking the ECT sensor wiring, inspecting the sensor for any physical damage, testing the sensor's resistance, and scanning for any additional trouble codes.

5. Can I still drive my 2009 Nissan Sentra with OBDII code P0118?

It is not recommended to drive your 2009 Nissan Sentra with OBDII code P0118, as it can lead to potential engine damage due to overheating or poor fuel mixture. It is best to address the issue promptly.

6. How can I repair OBDII code P0118 on my 2009 Nissan Sentra?

To repair OBDII code P0118 on a 2009 Nissan Sentra, you may need to replace the Engine Coolant Temperature sensor, repair any damaged wiring, clean or replace corroded connectors, or reset the ECM after fixing the issue.

7. Can a DIY enthusiast fix OBDII code P0118 on a 2009 Nissan Sentra?

If you have the necessary tools and automotive knowledge, you may be able to fix OBDII code P0118 on a 2009 Nissan Sentra yourself by following a repair manual or online guides. However, it is recommended to seek professional help if you are unsure.

8. How much does it cost to repair OBDII code P0118 on a 2009 Nissan Sentra?

The cost to repair OBDII code P0118 on a 2009 Nissan Sentra can vary depending on the cause of the issue and whether you choose to replace the sensor yourself or have a mechanic do the repairs. Costs can range from $50 to $200 or more.

9. Will resetting the OBDII code P0118 on my 2009 Nissan Sentra make it go away permanently?

Resetting the OBDII code P0118 on a 2009 Nissan Sentra may temporarily turn off the check engine light, but if the underlying issue causing the code is not fixed, the code is likely to reappear. It is essential to address the root cause of the problem.

10. Is OBDII code P0118 a serious issue on a 2009 Nissan Sentra?

OBDII code P0118 on a 2009 Nissan Sentra should be taken seriously, as it can lead to engine overheating, poor performance, and potential damage if left unresolved. It is recommended to address the issue promptly to prevent further problems.