AutoCodes – Infiniti – P0118 2005 Infiniti G35

P0118 2005 Infiniti G35 Code - Engine Coolant Temperature Circuit High Input

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 2005 Infiniti G35 indicates Engine Coolant Temperature Circuit High Input.
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 6,143

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
Cost to Diagnose
FAQs
Comments
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Code P0118 2005 Infiniti G35 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 2005 Infiniti G35 - Engine Coolant Temperature Circuit High Input - AutoCodes.com — P0118 2005 Infiniti G35 Code - Engine Coolant Temperature Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0118 2005 Infiniti G35?

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 2005 Infiniti G35?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2005 Infiniti G35 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 2005 Infiniti G35 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 2005 Infiniti G35 Code

1. What does OBDII code P0118 indicate in a 2005 Infiniti G35?

The code P0118 in a 2005 Infiniti G35 signifies an issue with the Engine Coolant Temperature (ECT) sensor circuit reporting a high input signal.

2. What are the common symptoms of OBDII code P0118 in a 2005 Infiniti G35?

Common symptoms of code P0118 in a 2005 Infiniti G35 may include engine overheating, poor fuel economy, rough idling, and an illuminated check engine light.

3. What are the possible causes of OBDII code P0118 in a 2005 Infiniti G35?

Potential causes of code P0118 in a 2005 Infiniti G35 include a faulty ECT sensor, a damaged ECT sensor connector, a corroded wiring harness, or a problem with the engine's cooling system.

4. How can I diagnose the issue related to OBDII code P0118 in my 2005 Infiniti G35?

To diagnose the problem associated with code P0118 in a 2005 Infiniti G35, you can use a scan tool to monitor the ECT sensor's readings, visually inspect the sensor and its wiring for any visible damage, and perform a resistance test on the sensor.

5. Can I drive my 2005 Infiniti G35 with OBDII code P0118?

It is not recommended to drive your 2005 Infiniti G35 with an unresolved P0118 code, as it can lead to potential engine damage due to incorrect temperature readings and improper fuel delivery.

6. How do I reset OBDII code P0118 in a 2005 Infiniti G35?

To reset the P0118 code in a 2005 Infiniti G35, you can use an OBDII scan tool to clear the code after addressing and fixing the underlying issue with the ECT sensor circuit.

7. Can a DIY enthusiast repair OBDII code P0118 in a 2005 Infiniti G35?

A DIY enthusiast with automotive knowledge and tools can potentially repair code P0118 in a 2005 Infiniti G35 by replacing the faulty ECT sensor, repairing damaged wiring, or fixing connector issues.

8. How much does it cost to fix OBDII code P0118 in a 2005 Infiniti G35 at a mechanic?

The cost of repairing code P0118 in a 2005 Infiniti G35 at a mechanic can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Will OBDII code P0118 in a 2005 Infiniti G35 affect vehicle performance?

Yes, code P0118 in a 2005 Infiniti G35 can impact vehicle performance by causing issues such as poor fuel economy, engine overheating, and potential drivability problems.

10. How long does it take to fix OBDII code P0118 in a 2005 Infiniti G35?

The time required to fix code P0118 in a 2005 Infiniti G35 can vary based on the specific cause of the issue and the expertise of the individual performing the repair, but it typically takes between 1 to 2 hours for a professional mechanic.