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P1116 Ford Code - Engine Coolant Temperature Sensor is Out of Self-Test Range

Quick Answer

The P1116 diagnostic trouble code for Ford vehicles indicates that the Engine Coolant Temperature Sensor is out of self-test range. Common causes include Faulty Temperature Sensor: The most common cause of the P1116 code is a malfunctioning engine coolant temperature sensor, Wiring Issues: Damage to the wiring harness or connectors connected to the temperature sensor can also trigger this code, Coolant Leaks: Low coolant levels or coolant leaks can affect the sensor's readings and lead to the P1116 code. 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
P1116 Ford indicates Engine Coolant Temperature Sensor is Out of Self-Test Range.
Common causes
Common causes include Faulty Temperature Sensor: The most common cause of the P1116 code is a malfunctioning engine coolant temperature sensor, Wiring Issues: Damage to the wiring harness or connectors connected to the temperature sensor can also trigger this code, Coolant Leaks: Low coolant levels or coolant leaks can affect the sensor's readings and lead to the P1116 code.
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 10, 2024
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Code P1116 Ford Description

The P1116 diagnostic trouble code for Ford vehicles indicates that the Engine Coolant Temperature Sensor is out of self-test range. This sensor is responsible for measuring the temperature of the engine coolant and sending this information to the engine control module (ECM) to help regulate the engine's operating temperature. When the sensor is not functioning properly or is sending inaccurate readings, it can lead to various issues with the vehicle's performance.

OBDII Code P1116 Ford - Engine Coolant Temperature Sensor is Out of Self-Test Range
P1116 Ford Code - Engine Coolant Temperature Sensor is Out of Self-Test Range

Common Causes of P1116 Ford

  1. Faulty Temperature Sensor: The most common cause of the P1116 code is a malfunctioning engine coolant temperature sensor.
  2. Wiring Issues: Damage to the wiring harness or connectors connected to the temperature sensor can also trigger this code.
  3. Coolant Leaks: Low coolant levels or coolant leaks can affect the sensor's readings and lead to the P1116 code.
  4. Thermostat Malfunction: A faulty thermostat can cause the engine coolant temperature to be out of range, triggering the code.
  5. ECM Malfunction: In rare cases, a malfunctioning ECM can also be responsible for the P1116 code.

Symptoms of P1116 Ford

  1. Check Engine Light: The most common symptom associated with the P1116 code is the illumination of the check engine light on the dashboard.
  2. Engine Overheating: If the engine coolant temperature sensor is sending incorrect readings, it may result in the engine overheating due to improper cooling system operation.
  3. Poor Fuel Economy: Inaccurate temperature readings can cause the ECM to make incorrect fuel mixture adjustments, leading to poor fuel efficiency.
  4. Rough Idle: A faulty engine coolant temperature sensor can result in rough idling or stalling of the engine.
  5. Decreased Performance: The vehicle may experience a decrease in performance, including sluggish acceleration and reduced power output.

How to Fix P1116 Ford

  1. Diagnostic: Begin by using a scan tool to retrieve the trouble codes and perform a comprehensive diagnostic test to confirm the issue.
  2. Check Sensor: Inspect the engine coolant temperature sensor for any signs of damage or corrosion. Replace the sensor if necessary.
  3. Check Wiring: Inspect the wiring harness and connectors for any damage or loose connections. Repair or replace as needed.
  4. Check Coolant Level: Ensure that the coolant level is adequate and there are no leaks in the cooling system.
  5. Clear Codes: After making the necessary repairs, clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1116 Ford

The typical repair costs for addressing the P1116 code on a Ford vehicle can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's important to check with local auto repair shops for a more accurate estimate based on your specific circumstances. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops often offer more affordable pricing.

What does this mean?

Tech Notes for P1116 Ford

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. The engine coolant temperature must be greater than 10°C (50°F) to pass the key ON engine OFF (KOEO) self-test and greater than 82°C (180°F) to pass the key ON engine running (KOER) self-test.

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Information for Specific Ford Models

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.

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