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P1116 1997 Ford F150 Code - Engine Coolant Temperature Sensor Out of Self-Test Range

Quick Answer

The P1116 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that the Engine Coolant Temperature (ECT) sensor is reporting a temperature that is outside the expected range during the self-test process. Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Wiring or connector issues related to the ECT sensor, Coolant level or quality issues affecting ECT sensor readings. 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 1997 Ford F150 indicates Engine Coolant Temperature Sensor Out of Self-Test Range.
Common causes
Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Wiring or connector issues related to the ECT sensor, Coolant level or quality issues affecting ECT sensor readings.
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 1997 Ford F150 Description

The P1116 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that the Engine Coolant Temperature (ECT) sensor is reporting a temperature that is outside the expected range during the self-test process. The ECT sensor plays a crucial role in monitoring the temperature of the engine coolant, which is essential for the engine's optimal performance and efficiency. When the ECT sensor is out of range, it can lead to various issues that affect the vehicle's performance and fuel efficiency.

OBDII Code P1116 1997 Ford F150 - Engine Coolant Temperature Sensor Out of Self-Test Range
P1116 1997 Ford F150 Code - Engine Coolant Temperature Sensor Out of Self-Test Range

Common Causes of P1116 1997 Ford F150

  1. Faulty Engine Coolant Temperature (ECT) sensor
  2. Wiring or connector issues related to the ECT sensor
  3. Coolant level or quality issues affecting ECT sensor readings
  4. ECM software or hardware issues
  5. Cooling system problems affecting ECT sensor accuracy

Symptoms of P1116 1997 Ford F150

  1. Check Engine Light illuminated on the dashboard
  2. Engine running hotter or colder than normal
  3. Decreased fuel efficiency
  4. Rough idling or stalling
  5. Hesitation during acceleration

How to Fix P1116 1997 Ford F150

  1. Begin by diagnosing the ECT sensor using a scan tool to verify the code and check the sensor's readings.
  2. Inspect the wiring and connectors associated with the ECT sensor for any damage or corrosion, repairing or replacing as needed.
  3. Test the coolant level and quality to ensure it is within the manufacturer's specifications.
  4. Replace the ECT sensor if it is found to be faulty or out of range.
  5. Clear the DTC and perform a test drive to verify that the issue has been resolved.

Cost to Fix P1116 1997 Ford F150

The cost of repairing a P1116 code on a 1997 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 for the part, with additional costs for labor. The total repair cost, including parts and labor, can range from $150 to $300 or more. It is important to note that labor rates at auto repair shops can vary, typically ranging from $80 to $150 per hour. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. It is advisable to consult with a qualified mechanic or auto repair shop to get a more accurate estimate based on your specific circumstances.

What does this mean?

Tech Notes for P1116 1997 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 1997 Ford F150 Code

1. What does the OBDII code P1116 mean for a 1997 Ford F150?

P1116 indicates the Engine Coolant Temperature (ECT) sensor is reading values outside the expected range during a self-test.

2. What are the symptoms of the P1116 code on a 1997 Ford F150?

Symptoms may include poor engine performance, hard starting, rough idling, decreased fuel efficiency, or an illuminated check engine light.

3. What causes the P1116 code to appear?

Common causes include a faulty ECT sensor, damaged wiring or connectors, a coolant system issue, or a malfunctioning Powertrain Control Module (PCM).

4. Can a bad thermostat trigger the P1116 code?

Yes, a stuck-open or failing thermostat can cause inaccurate coolant temperature readings, potentially triggering the P1116 code.

5. How do I diagnose the P1116 code on my 1997 Ford F150?

Start by inspecting the ECT sensor, wiring, and connections for damage. Use a multimeter to check the sensor's resistance and compare it to manufacturer specifications.

6. Is it safe to drive with the P1116 code?

Driving with this code isn’t recommended, as it may lead to poor engine performance, overheating, or long-term damage to the engine.

7. How do I fix the P1116 code on a 1997 Ford F150?

Repairs may include replacing the ECT sensor, repairing wiring or connectors, flushing and refilling the coolant, or replacing a faulty thermostat.

8. Does low coolant cause the P1116 code?

Yes, low coolant levels can result in inaccurate readings from the ECT sensor, potentially triggering the P1116 code.

9. How much does it cost to repair the P1116 code?

The cost can vary but typically includes $20–$50 for an ECT sensor and additional labor costs if professional repair is required.

10. Can I reset the P1116 code without fixing the issue?

While you can clear the code with an OBDII scanner, the issue will likely return unless the underlying problem is resolved.

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