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P1116 1999 Ford F150 Code - Engine Coolant Temperature Sensor Out of Self-Test Range

Quick Answer

The P1116 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates that the Engine Coolant Temperature (ECT) sensor is out of self-test range. Common causes include Faulty ECT Sensor: The most common cause of the P1116 code is a malfunctioning ECT sensor that is providing incorrect temperature readings, Wiring or Connector Issues: Damaged or corroded wiring or connectors connected to the ECT sensor can disrupt the signal to the ECM, Malfunctioning ECM: A problem with the engine control module can prevent it from receiving accurate data from the ECT 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
P1116 1999 Ford F150 indicates Engine Coolant Temperature Sensor Out of Self-Test Range.
Common causes
Common causes include Faulty ECT Sensor: The most common cause of the P1116 code is a malfunctioning ECT sensor that is providing incorrect temperature readings, Wiring or Connector Issues: Damaged or corroded wiring or connectors connected to the ECT sensor can disrupt the signal to the ECM, Malfunctioning ECM: A problem with the engine control module can prevent it from receiving accurate data from the ECT 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P1116 1999 Ford F150 Description

The P1116 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates that the Engine Coolant Temperature (ECT) sensor is out of self-test range. The ECT sensor is a crucial component of the vehicle's engine management system, as it measures the temperature of the engine coolant. This information is used by the engine control module (ECM) to adjust fuel delivery and ignition timing for optimal performance and efficiency. When the ECT sensor is out of self-test range, it means that the ECM is receiving a signal that is outside of the expected parameters, which can lead to various issues with the vehicle's operation.

OBDII Code P1116 1999 Ford F150 - Engine Coolant Temperature Sensor Out of Self-Test Range
P1116 1999 Ford F150 Code - Engine Coolant Temperature Sensor Out of Self-Test Range

Common Causes of P1116 1999 Ford F150

  1. Faulty ECT Sensor: The most common cause of the P1116 code is a malfunctioning ECT sensor that is providing incorrect temperature readings.
  2. Wiring or Connector Issues: Damaged or corroded wiring or connectors connected to the ECT sensor can disrupt the signal to the ECM.
  3. Malfunctioning ECM: A problem with the engine control module can prevent it from receiving accurate data from the ECT sensor.
  4. Cooling System Problems: Issues with the vehicle's cooling system, such as low coolant levels or a malfunctioning thermostat, can affect the ECT sensor's readings.
  5. Engine Overheating: If the engine has overheated in the past, it can damage the ECT sensor and cause it to malfunction.

Symptoms of P1116 1999 Ford F150

  1. Check Engine Light: The most common symptom associated with the P1116 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Poor Fuel Economy: A faulty ECT sensor can lead to incorrect fuel delivery, resulting in decreased fuel efficiency.
  3. Rough Idling: Incorrect temperature readings can cause the engine to idle roughly or inconsistently.
  4. Engine Misfires: Inaccurate ECT readings can lead to engine misfires, which can cause performance issues and potential damage.
  5. Overheating or Cooling System Malfunction: If the ECT sensor is not providing accurate data, it may lead to overheating or cooling system problems.

How to Fix P1116 1999 Ford F150

  1. Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the ECT sensor, wiring, and connectors to identify the root cause of the problem.
  2. Replace the ECT Sensor: If the ECT sensor is found to be faulty, replace it with a new, OEM-quality sensor to ensure accurate temperature readings.
  3. Repair Wiring or Connectors: If wiring or connectors are damaged, repair or replace them as needed to restore proper signal transmission.
  4. Check Cooling System: Inspect the vehicle's cooling system for any issues that may be affecting the ECT sensor's readings, such as low coolant levels or a faulty thermostat.
  5. Clear DTC and Test Drive: After completing the repairs, clear the DTC from the ECM's memory and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P1116 1999 Ford F150

The typical repair costs for addressing a P1116 code on a 1999 Ford F150 can vary depending on the specific cause of the issue. In general, the cost of replacing an ECT sensor ranges from $50 to $150, while repairing wiring or connectors may add additional labor costs. The total repair bill, including parts and labor, can range from $100 to $300 or more. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate. Additionally, factors such as the vehicle's make and model, engine type, and location can also impact the final repair costs.

What does this mean?

Tech Notes for P1116 1999 Ford F150

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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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 P1116 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1116 on a 1999 Ford F150?

- Common symptoms include engine overheating, inaccurate temperature gauge readings, and a Check Engine light on the dashboard.

2. What does OBDII code P1116 mean on a 1999 Ford F150?

- OBDII code P1116 indicates that the Engine Coolant Temperature Sensor is out of the self-test range, signaling a potential issue with the sensor or its circuit.

3. What are the possible causes of OBDII code P1116 on a 1999 Ford F150?

- The possible causes of OBDII code P1116 include a faulty Engine Coolant Temperature Sensor, wiring issues, a malfunctioning thermostat, or a problem with the cooling system.

4. How can I diagnose the issue causing OBDII code P1116 on my 1999 Ford F150?

- You can diagnose the issue by checking the Engine Coolant Temperature Sensor for proper resistance, inspecting the wiring for any damage, testing the thermostat, and ensuring the cooling system is functioning correctly.

5. Can I still drive my 1999 Ford F150 with OBDII code P1116?

- It is not recommended to drive your vehicle with OBDII code P1116 as it can lead to engine overheating and other potential issues. It's best to address the problem promptly.

6. How can I repair OBDII code P1116 on my 1999 Ford F150?

- To repair OBDII code P1116, you may need to replace the Engine Coolant Temperature Sensor, repair any damaged wiring, replace a faulty thermostat, or address any issues with the cooling system.

7. Will resetting the Check Engine light fix OBDII code P1116 on my 1999 Ford F150?

- Resetting the Check Engine light will not fix the underlying issue causing OBDII code P1116. It's important to diagnose and address the root cause of the problem to prevent further issues.

8. How much does it cost to fix OBDII code P1116 on a 1999 Ford F150?

- The cost to fix OBDII code P1116 can vary depending on the specific cause of the issue. It may involve replacing the Engine Coolant Temperature Sensor, repairing wiring, or addressing other related components.

9. Can a DIY enthusiast repair OBDII code P1116 on a 1999 Ford F150?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to repair OBDII code P1116 by following a repair manual or online guides. However, it's important to ensure the repair is done correctly to avoid further issues.

10. Will OBDII code P1116 cause any long-term damage to my 1999 Ford F150 if left unrepaired?

- Leaving OBDII code P1116 unrepaired can potentially lead to engine overheating, poor performance, and other related issues. It's best to address the problem promptly to prevent any long-term damage to your vehicle.

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