AutoCodes – Infiniti – P0116 Infiniti

P0116 Infiniti Code - Engine Coolant Temperature Sensor Circuit Range/Performance

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: P0116 Infiniti indicates Engine Coolant Temperature Sensor Circuit Range/Performance.
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 20,886

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 P0116 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 P0116 Infiniti - Engine Coolant Temperature Sensor Circuit Range/Performance - AutoCodes.com — P0116 Infiniti Code - Engine Coolant Temperature Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0116 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 P0116 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 P0116 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 P0116 Infiniti code?

Need more information on how to fix the P0116 Infiniti code? Get Access to Factory Service Manuals

Need Help with the 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 P0116 Infiniti Code

1. What are the common symptoms of OBDII code P0116 in an Infiniti?

Symptoms can include poor fuel economy, rough idling, overheating, and the temperature gauge reading inaccurately.

2. What causes the OBDII code P0116 in an Infiniti?

The code is usually triggered by a faulty engine coolant temperature sensor, issues with the sensor's circuit, or problems with the coolant temperature circuit wiring.

3. How can I diagnose the OBDII code P0116 in my Infiniti?

Diagnosis typically involves checking the engine coolant temperature sensor's resistance, inspecting the wiring for any damage, and ensuring proper sensor connectivity.

4. Can a faulty thermostat cause the OBDII code P0116 in an Infiniti?

Yes, a malfunctioning thermostat can affect the engine coolant temperature readings and potentially trigger the P0116 code.

5. Are there any quick repair tips for fixing OBDII code P0116 in an Infiniti?

Quick fixes may include checking and tightening the sensor's connections, replacing the engine coolant temperature sensor, or repairing any damaged wiring.

6. How serious is OBDII code P0116 in an Infiniti?

While the code may not always lead to immediate breakdown, it is important to address it promptly to avoid potential engine damage or overheating issues.

7. Can I drive my Infiniti with the OBDII code P0116?

It is not recommended to drive your vehicle with the P0116 code active, as it can lead to poor engine performance and potential overheating problems.

8. How much does it typically cost to repair OBDII code P0116 in an Infiniti?

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

9. Will resetting the OBDII system clear the P0116 code in my Infiniti?

Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

10. Can a DIY enthusiast fix the OBDII code P0116 in an Infiniti?

While some simple repairs like sensor replacement or wiring checks can be done by DIYers, complex diagnosis and repairs may require professional help to ensure proper resolution.