AutoCodes – Infiniti – P0117 Infiniti

P0117 Infiniti Code - Engine Coolant Temperature Circuit Low

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: P0117 Infiniti indicates Engine Coolant Temperature Circuit Low.
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 5,797

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 May 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0117 Infiniti 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.

Sensor Example:

OBDII Code P0117 Infiniti - Engine Coolant Temperature Circuit Low - AutoCodes.com — P0117 Infiniti Code - Engine Coolant Temperature Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0117 Infiniti?

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 circuit poor electrical connection

How to Fix the DTC P0117 Infiniti?

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 P0117 Infiniti 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 P0117 Infiniti code?

Need more information on how to fix the P0117 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0117 Infiniti code diagnosed by a professional: Find a repair shop in your area

Information for Specific Infiniti Models

P0117 2003 Infiniti G35 — Engine Coolant Temperature Circuit Low
P0117 2004 Infiniti G35 — Engine Coolant Temperature Circuit Low
P0117 2005 Infiniti G35 — Engine Coolant Temperature Circuit Low
P0117 2006 Infiniti G35 — Engine Coolant Temperature Circuit Low

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 Infiniti Code

1. What are the common symptoms of OBDII code P0117 in an Infiniti?

- Common symptoms include a noticeable decrease in fuel efficiency, engine overheating, rough idling, and dashboard warning lights.

2. What can cause the OBDII code P0117 in an Infiniti?

- The code is typically triggered by a faulty engine coolant temperature sensor, issues with the sensor's wiring or connector, low coolant levels, or a malfunctioning thermostat.

3. How can I diagnose the OBDII code P0117 in my Infiniti?

- You can use a diagnostic scanner to read the code, visually inspect the coolant temperature sensor and its wiring, test the sensor's resistance, and check the coolant level and thermostat.

4. What are some repair tips for fixing the OBDII code P0117 in an Infiniti?

- Repair options include replacing the engine coolant temperature sensor, repairing or replacing damaged wiring, ensuring proper coolant levels, and replacing a faulty thermostat.

5. Can driving with the OBDII code P0117 in an Infiniti cause further damage?

- Continuing to drive with this code may lead to engine overheating, potential damage to engine components, reduced fuel efficiency, and increased emissions.

6. How urgent is it to address the OBDII code P0117 in an Infiniti?

- It is recommended to address this code promptly to prevent potential engine damage, overheating, and to maintain optimal performance and fuel efficiency.

7. Can a DIY enthusiast fix the OBDII code P0117 in an Infiniti?

- Depending on your skill level, you may be able to address this code yourself by following repair guides and using basic tools. However, if unsure, it's best to consult a professional mechanic.

8. How much does it typically cost to repair the OBDII code P0117 in an Infiniti?

- The cost of repairs can vary based on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

9. Will resetting the OBDII code P0117 in an Infiniti make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear once the system detects the problem again.

10. Can extreme weather conditions affect the OBDII code P0117 in an Infiniti?

- Yes, extreme cold or hot weather can potentially impact the engine coolant temperature sensor's readings and trigger the P0117 code. It's important to monitor your vehicle's temperature in such conditions.