AutoCodes – Ford – P0117 2012 Ford Fusion

P0117 2012 Ford Fusion Code - Engine Coolant Temperature Sensor 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 thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor. 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 2012 Ford Fusion indicates Engine Coolant Temperature Sensor Circuit Low.
Common causes: Common causes include Low engine coolant level, Faulty engine coolant thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor.
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 2,786

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 Aug 02, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0117 2012 Ford Fusion Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Powertrain Control Module (PCM). The modified signal returns to the PCM 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. The Diagnostic Trouble Code (DTC) indicates the sensor signal is greater than the self-test maximum. The ECT sensor minimum is 0.2 volts or 121°C (250°F).

OBDII Code P0117 2012 Ford Fusion - Engine Coolant Temperature Sensor Circuit Low - AutoCodes.com — P0117 2012 Ford Fusion Code - Engine Coolant Temperature Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0117 2012 Ford Fusion?

Low engine coolant level
Faulty engine coolant thermostat
Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0117 2012 Ford Fusion?

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

Start by checking for coolant leaks, and if there are no leaks, the thermostat might be stuck closed and needs replacement. If the problem persists, change the Engine Coolant Temperature (ECT) sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0117 2012 Ford Fusion 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 2012 Ford Fusion code?

Need more information on how to fix the P0117 2012 Ford Fusion code? Get Access to Factory Service Manuals

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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 P0117 2012 Ford Fusion Code

1. What does the OBDII code P0117 on a 2012 Ford Fusion mean?

The code P0117 indicates a problem with the Engine Coolant Temperature Sensor Circuit Low.

2. What are some common symptoms of the P0117 OBDII code in a 2012 Ford Fusion?

Common symptoms include poor fuel economy, engine overheating, rough idling, and the "Check Engine" light illuminating on the dashboard.

3. What are the possible causes of the P0117 code on a 2012 Ford Fusion?

Potential causes include a faulty engine coolant temperature sensor, damaged wiring or connectors in the sensor circuit, low coolant level, or a malfunctioning thermostat.

4. How can I diagnose the P0117 code on my 2012 Ford Fusion?

Diagnosing the P0117 code involves testing the engine coolant temperature sensor, checking the wiring and connectors for any damage, verifying the coolant level, and ensuring the thermostat is functioning correctly.

5. Can I drive my 2012 Ford Fusion with the P0117 code present?

It is not recommended to drive your vehicle with the P0117 code present, as it can lead to potential engine damage or overheating issues.

6. How can I repair the P0117 code on my 2012 Ford Fusion?

To repair the P0117 code, you may need to replace the engine coolant temperature sensor, repair any damaged wiring or connectors, top up the coolant level, or replace a faulty thermostat.

7. Will resetting the OBDII code make the P0117 issue go away in my 2012 Ford Fusion?

Resetting the code may temporarily clear the "Check Engine" light, but it will not fix the underlying issue causing the P0117 code.

8. How much does it cost to fix the P0117 code on a 2012 Ford Fusion?

The cost of fixing the P0117 code can vary depending on the exact cause of the issue, but it may involve parts and labor expenses for sensor replacement or wiring repairs.

9. Can a DIY enthusiast address the P0117 code on a 2012 Ford Fusion?

If you have the necessary tools and expertise, you may be able to address the P0117 code yourself by following repair guides or consulting with a mechanic for advice.

10. How often does the P0117 code occur in a 2012 Ford Fusion?

The P0117 code can occur sporadically or more frequently depending on the specific conditions and issues affecting the engine coolant temperature sensor circuit in the 2012 Ford Fusion.