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Engine-Codes – Ford – P0118 2020 Ford F150

P0118 2020 Ford F150 Code - Engine Coolant Temperature Sensor 1 Circuit High

Quick Answer

The P0118 code for a 2020 Ford F150 indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a high voltage. Common causes include Faulty ECT sensor, Wiring issues or shorts in the ECT sensor circuit, Corrosion or poor connections in the ECT sensor circuit. 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 2020 Ford F150 indicates Engine Coolant Temperature Sensor 1 Circuit High.
Common causes
Common causes include Faulty ECT sensor, Wiring issues or shorts in the ECT sensor circuit, Corrosion or poor connections in the ECT sensor circuit.
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 2020 Ford F150 Description

The P0118 code for a 2020 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 to optimize engine performance and fuel efficiency. When the ECT sensor circuit shows a high voltage reading, it means that the engine coolant temperature is higher than expected, which can lead to various issues.

OBDII Code P0118 2020 Ford F150 - Engine Coolant Temperature Sensor 1 Circuit High
P0118 2020 Ford F150 Code - Engine Coolant Temperature Sensor 1 Circuit High

Common Causes of P0118 2020 Ford F150

  1. Faulty ECT sensor
  2. Wiring issues or shorts in the ECT sensor circuit
  3. Corrosion or poor connections in the ECT sensor circuit
  4. Coolant leaks affecting the ECT sensor readings
  5. Issues with the ECM interpreting ECT sensor data

Symptoms of P0118 2020 Ford F150

  1. Engine overheating
  2. Poor fuel economy
  3. Rough idling or stalling
  4. Check Engine Light illuminated
  5. Reduced engine performance

How to Fix P0118 2020 Ford F150

  1. Begin by diagnosing the ECT sensor and its circuit using a multimeter to check for proper voltage readings.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections.
  3. Replace the ECT sensor if it is found to be faulty or not providing accurate readings.
  4. Clear the diagnostic trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.
  5. Monitor the engine coolant temperature and verify that the ECT sensor is now functioning correctly.

Cost to Fix P0118 2020 Ford F150

The typical repair costs for addressing a P0118 code on a 2020 Ford F150 can vary depending on the specific cause of the issue. In general, replacing the ECT sensor or repairing wiring/connectors may cost between $100 to $300, including parts and labor. However, additional diagnostic time and labor charges may apply, and rates can vary based on location, vehicle make and model, and the shop's hourly rates. It is advisable to consult with a trusted auto repair shop to get a more accurate estimate for this repair.

What does this mean?

Tech Notes for P0118 2020 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 2020 Ford F150 Code

1. What does OBDII code P0118 on a 2020 Ford F150 indicate?

The code P0118 on a 2020 Ford F150 indicates a problem with the Engine Coolant Temperature Sensor 1 Circuit reading a high voltage.

2. What are the common symptoms of a faulty Engine Coolant Temperature Sensor on a 2020 Ford F150?

Common symptoms of a faulty Engine Coolant Temperature Sensor on a 2020 Ford F150 include issues with engine performance, poor fuel economy, rough idling, and potential overheating.

3. What are the possible causes of the Engine Coolant Temperature Sensor 1 Circuit High code on a 2020 Ford F150?

Common causes of the P0118 code on a 2020 Ford F150 include a faulty temperature sensor, a wiring issue, a corroded connector, or a problem with the engine's coolant system.

4. How can I diagnose the issue causing the P0118 code on my 2020 Ford F150?

To diagnose the issue causing the P0118 code, you can use a scan tool to read the live data from the coolant temperature sensor, visually inspect the sensor and its wiring for any damage, and test the sensor's resistance with a multimeter.

5. Can I still drive my 2020 Ford F150 with the Engine Coolant Temperature Sensor 1 Circuit High code?

It is not recommended to drive your 2020 Ford F150 with the P0118 code as it can lead to engine performance issues and potential overheating problems. It's best to address the issue promptly.

6. How can I repair the Engine Coolant Temperature Sensor 1 Circuit High code on my 2020 Ford F150?

Repairing the P0118 code on your 2020 Ford F150 may involve replacing the faulty coolant temperature sensor, repairing or replacing damaged wiring, cleaning the connector, or addressing any coolant system issues.

7. Will resetting the OBDII codes make the P0118 code go away on my 2020 Ford F150?

Resetting the OBDII codes may temporarily clear the P0118 code, but if the underlying issue causing the code is not addressed, it is likely to reappear after some driving cycles.

8. How much does it typically cost to fix the Engine Coolant Temperature Sensor issue on a 2020 Ford F150?

The cost to fix the Engine Coolant Temperature Sensor issue on a 2020 Ford F150 can vary depending on the exact cause of the problem, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast replace the Engine Coolant Temperature Sensor on a 2020 Ford F150?

Replacing the Engine Coolant Temperature Sensor on a 2020 Ford F150 can be a DIY-friendly task for those with some mechanical experience and the right tools. However, if unsure, it's best to consult a professional mechanic.

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