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P0118 2017 Ford F150 Code - Engine Coolant Temperature Sensor 1 Circuit High

Quick Answer

The P0118 code for a 2017 Ford F150 indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a high voltage. Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Damaged sensor wiring harness, Corroded or loose connector. 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 2017 Ford F150 indicates Engine Coolant Temperature Sensor 1 Circuit High.
Common causes
Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Damaged sensor wiring harness, Corroded or loose connector.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0118 2017 Ford F150 Description

The P0118 code for a 2017 Ford F150 indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a high voltage. The ECT sensor is a crucial component that monitors the temperature of the engine coolant and sends this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance and efficiency. When the ECT sensor circuit reports a high voltage, it means that the engine coolant temperature is higher than expected, which can lead to various issues.

OBDII Code P0118 2017 Ford F150 - Engine Coolant Temperature Sensor 1 Circuit High
P0118 2017 Ford F150 Code - Engine Coolant Temperature Sensor 1 Circuit High

Common Causes of P0118 2017 Ford F150

  1. Faulty Engine Coolant Temperature (ECT) sensor.
  2. Damaged sensor wiring harness.
  3. Corroded or loose connector.
  4. ECM malfunction.
  5. Coolant leak affecting sensor readings.

Symptoms of P0118 2017 Ford F150

  1. Check Engine Light illuminated on the dashboard.
  2. Engine running hotter than normal.
  3. Decreased fuel efficiency.
  4. Rough idling or stalling.
  5. Poor engine performance.

How to Fix P0118 2017 Ford F150

  1. Begin by diagnosing the issue using a scan tool to confirm the P0118 code and pinpoint the exact cause.
  2. Inspect the ECT sensor, wiring harness, and connector for any visible damage or corrosion. Replace any faulty components.
  3. Test the ECT sensor resistance with a multimeter to ensure it is within the manufacturer's specifications.
  4. Clear the trouble code from the ECM memory and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying issues with the cooling system or ECM.

Cost to Fix P0118 2017 Ford F150

The typical repair costs for addressing a P0118 code on a 2017 Ford F150 can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it's recommended to consult with local auto repair shops.

What does this mean?

Tech Notes for P0118 2017 Ford F150

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

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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 2017 Ford F150 Code

1. What are the common symptoms of OBDII code P0118 on a 2017 Ford F150?

- Common symptoms include the engine running hotter than normal, the temperature gauge reading high, and the Check Engine light being illuminated.

2. What does the OBDII code P0118 "Engine Coolant Temperature Sensor 1 Circuit High" mean for a 2017 Ford F150?

- This code indicates that the Engine Coolant Temperature (ECT) Sensor 1 is sending a voltage signal that is higher than the expected range.

3. What are the possible causes of OBDII code P0118 on a 2017 Ford F150?

- Possible causes include a faulty ECT sensor, a damaged sensor wiring harness, a corroded connector, or issues with the engine coolant temperature circuit.

4. How can I diagnose the OBDII code P0118 on my 2017 Ford F150?

- You can diagnose the code by checking the ECT sensor for proper operation, inspecting the wiring for any damage, and using a multimeter to test the sensor's resistance and voltage output.

5. Can driving with OBDII code P0118 on a 2017 Ford F150 cause further damage?

- While driving with this code may not immediately harm the vehicle, ignoring it can lead to overheating issues and potential engine damage over time.

6. How can I repair OBDII code P0118 on a 2017 Ford F150?

- Repair involves replacing the Engine Coolant Temperature sensor if faulty, repairing or replacing damaged wiring, and clearing the trouble codes with a diagnostic scanner.

7. Is it safe to continue driving my 2017 Ford F150 with the OBDII code P0118 active?

- It is generally not recommended to drive with this code active, as it can lead to inaccurate temperature readings and potential engine overheating.

8. Can a DIY enthusiast fix the OBDII code P0118 on a 2017 Ford F150?

- A DIY enthusiast with the necessary tools and knowledge can often fix this issue by replacing the ECT sensor and addressing any wiring problems.

9. How much does it typically cost to repair OBDII code P0118 on a 2017 Ford F150 at a mechanic?

- The cost of repairs can vary depending on the labor rates and parts prices, but replacing the ECT sensor and addressing associated issues may cost a few hundred dollars.

10. Will resetting the OBDII code P0118 on a 2017 Ford F150 make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine light, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

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