AutoCodes – Ford – P0117 2003 Ford F150

P0117 2003 Ford F150 Code - Engine Coolant Temperature Sensor Circuit Low

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty engine coolant thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) 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: P0117 2003 Ford F150 indicates Engine Coolant Temperature Sensor Circuit Low.
Common causes: Common causes include Low engine coolant level, Faulty engine coolant thermostat, Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) 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.

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Code Popularity 4,594

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 02, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0117 2003 Ford F150 Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Powertrain Control Module (PCM). The modified signal returns to the PCM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. The Diagnostic Trouble Code (DTC) indicates the sensor signal is greater than the self-test maximum. The ECT sensor minimum is 0.2 volts or 121°C (250°F).

OBDII Code P0117 2003 Ford F150 - Engine Coolant Temperature Sensor Circuit Low - AutoCodes.com — P0117 2003 Ford F150 Code - Engine Coolant Temperature Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0117 2003 Ford F150?

Low engine coolant level
Faulty engine coolant thermostat
Faulty Engine Coolant Temperature (ECT) Sensor or Cylinder Head Temperature (CHT) Sensor
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor or Cylinder Head Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0117 2003 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0117 2003 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P0117 2003 Ford F150 Code

1. What are common symptoms of OBDII code P0117 in a 2003 Ford F150?

- Common symptoms include poor fuel economy, rough idling, engine overheating, and inaccurate temperature gauge readings.

2. What does the OBDII code P0117 indicate in a 2003 Ford F150?

- OBDII code P0117 indicates a low circuit voltage from the engine coolant temperature (ECT) sensor.

3. What are the possible causes of a P0117 code in a 2003 Ford F150?

- Possible causes include a faulty ECT sensor, damaged wiring or connectors, low coolant levels, or a malfunctioning engine control module (ECM).

4. How can I diagnose a P0117 code in my 2003 Ford F150?

- To diagnose a P0117 code, you can use a multimeter to test the ECT sensor's resistance, check the wiring for any damage, and inspect the coolant level in the vehicle.

5. Can I drive my 2003 Ford F150 with a P0117 code?

- It is not recommended to drive with a P0117 code as it may lead to engine damage or overheating. It's best to address the issue promptly.

6. How do I repair a P0117 code in my 2003 Ford F150?

- The repair for a P0117 code typically involves replacing the faulty ECT sensor, repairing any damaged wiring or connectors, and ensuring proper coolant levels.

7. Are there any DIY tips for fixing a P0117 code in a 2003 Ford F150?

- DIY tips include checking the ECT sensor's connector for corrosion, ensuring a proper coolant mixture, and inspecting the sensor's location for any physical damage.

8. Can a faulty ECT sensor cause other issues in a 2003 Ford F150?

- Yes, a faulty ECT sensor can cause issues like poor engine performance, incorrect fuel mixture, and potential engine overheating if not addressed promptly.

9. How much does it cost to repair a P0117 code in a 2003 Ford F150?

- The cost to repair a P0117 code can vary depending on the cause, but generally, replacing the ECT sensor can cost between $50 to $150 including parts and labor.

10. Will resetting the OBDII code P0117 in my 2003 Ford F150 make it go away permanently?

- Resetting the code may temporarily clear the warning, but if the underlying issue causing the P0117 code is not fixed, the code is likely to reappear. It's important to diagnose and address the root cause of the problem.