AutoCodes – Ford – P0116 2009 Ford Fusion

P0116 2009 Ford Fusion Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance

Quick Answer

Indicates the engine coolant temperature rationality test has failed. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) 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 2009 Ford Fusion indicates Engine Coolant Temperature Sensor 1 Circuit Range/Performance.
Common causes: Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) 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 3,025

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0116 2009 Ford Fusion Description

Indicates the engine coolant temperature rationality test has failed. This DTC indicates that the ECT or cylinder head temperature (CHT) value is higher than the calibrated value and could prevent one or more on-board diagnostic (OBD) monitors from completing. The Powertrain Control Module (PCM) runs this logic after an engine off and a calibrated soak period(typically 6 hours). This soak period allows the intake air temperature (IAT) and the CHT or ECT to stabilize and not differ by more than a calibrated value. DTC P0116 sets when all of the following conditions are met: The ECT at engine start exceeds the IAT at engine start by more than a calibrated value, typically 17Â°C (30Â°F).

OBDII Code P0116 2009 Ford Fusion - Engine Coolant Temperature Sensor 1 Circuit Range/Performance - AutoCodes.com — P0116 2009 Ford Fusion Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0116 2009 Ford Fusion?

Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor
Faulty engine coolant thermostat
Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor harness is open or shorted
Engine Coolant Temperature (ECT) sensor or cylinder head temp (CHT) sensor circuit poor electrical connection

How to Fix the DTC P0116 2009 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, if there are not leaks the thermostat might be stuck open or closed and may need to be replaced, you still have an issue the engine coolant temp sensor or cylinder head temp sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0116 2009 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.

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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 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P0116 on a 2009 Ford Fusion?

- Common symptoms include issues with the vehicle's engine performance, such as poor fuel economy, rough idling, or difficulty starting the engine.

2. What does the OBDII code P0116 on a 2009 Ford Fusion indicate?

- This code indicates a problem with the Engine Coolant Temperature Sensor 1 Circuit Range/Performance, suggesting an issue with the sensor's readings.

3. What are the possible causes of OBDII code P0116 on a 2009 Ford Fusion?

- Possible causes include a faulty engine coolant temperature sensor, wiring issues in the sensor circuit, low coolant levels, or a problem with the engine's cooling system.

4. How can I diagnose the cause of OBDII code P0116 on my 2009 Ford Fusion?

- Diagnosing the issue involves checking the coolant level, inspecting the sensor and its wiring for damage, and using a multimeter to test the sensor's resistance.

5. Can driving with OBDII code P0116 on a 2009 Ford Fusion cause further damage?

- Continuing to drive with this code may lead to engine overheating or incorrect fuel mixture, potentially causing damage to the engine over time.

6. How can I repair OBDII code P0116 on my 2009 Ford Fusion?

- Repairing this code typically involves replacing the engine coolant temperature sensor, ensuring proper wiring connections, and clearing the code with an OBDII scanner.

7. Are there any tips for preventing OBDII code P0116 on a 2009 Ford Fusion?

- Regularly checking and maintaining the coolant level, keeping the cooling system in good condition, and addressing any warning signs promptly can help prevent this code.

8. Can a DIY enthusiast fix OBDII code P0116 on a 2009 Ford Fusion?

- Yes, replacing the engine coolant temperature sensor and checking the wiring can be done by a DIY enthusiast with some mechanical knowledge and the right tools.

9. How long does it typically take to repair OBDII code P0116 on a 2009 Ford Fusion?

- Depending on the extent of the issue and the DIY enthusiast's experience, repairing this code can take anywhere from 30 minutes to a few hours.

10. Will OBDII code P0116 on a 2009 Ford Fusion cause the check engine light to illuminate?

- Yes, this code will trigger the check engine light to illuminate on the dashboard of the 2009 Ford Fusion, indicating a problem with the engine coolant temperature sensor circuit.