P1117 2003 Ford F150 Code - Engine Coolant Temperature Sensor Intermittent
Quick Answer
The Engine Coolant Temperature (ECT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted. 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
- P1117 2003 Ford F150 indicates Engine Coolant Temperature Sensor Intermittent.
- Common causes
- Common causes include Low Engine Coolant Level, Faulty Engine Coolant Temperature (ECT) sensor, Engine Coolant Temperature (ECT) sensor harness is open or shorted.
- 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.
Code P1117 2003 Ford F150 Description
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor (pull-up resister) in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The ECT measures the temperature of the engine coolant. The PCM uses the ECT input for fuel control and for cooling fan control. There are 3 types of ECT sensors; threaded, push-in, and twist-lock. The ECT sensor is located in an engine coolant passage.
What are the Possible Causes of the DTC P1117 2003 Ford F150?
- Low Engine Coolant Level
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Thermostat
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P1117 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1117 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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Frequently Asked Questions about P1117 2003 Ford F150 Code
What does the OBDII code P1117 mean on a 2003 Ford F150?
P1117 indicates that the Engine Coolant Temperature (ECT) sensor signal is intermittent, meaning the sensor is not consistently sending accurate data to the engine control module (ECM).
What are the common symptoms of code P1117 on a 2003 Ford F150?
Symptoms may include engine overheating, poor fuel efficiency, rough idling, difficulty starting, or the temperature gauge behaving erratically.
What causes the P1117 code to appear on a 2003 Ford F150?
Common causes include a faulty ECT sensor, damaged wiring or connectors, corroded electrical contacts, or issues with the ECM.
Can driving with the P1117 code cause further damage?
Yes, ignoring this code can lead to engine overheating or inefficient performance, which may result in significant mechanical damage over time.
How do you diagnose the P1117 code on a 2003 Ford F150?
Diagnosis typically involves checking the ECT sensor, inspecting the wiring and connectors for damage or corrosion, and testing the ECM for proper operation.
What tools are needed to repair the P1117 code on a 2003 Ford F150?
Basic tools include an OBDII scanner, a multimeter for testing electrical circuits, and potentially wrenches to replace the ECT sensor.
How do you fix the P1117 code on a 2003 Ford F150?
Repairs may involve replacing the ECT sensor, fixing damaged wiring or connectors, cleaning corroded contacts, or reprogramming or replacing the ECM if necessary.
Where is the Engine Coolant Temperature (ECT) sensor located on a 2003 Ford F150?
The ECT sensor is typically located near the thermostat housing or on the intake manifold where coolant flows.
What does an intermittent signal from the ECT sensor mean?
It means the sensor is sending inconsistent or unreliable data to the ECM, which can cause the engine to mismanage temperature and fuel calculations.
How much does it typically cost to fix a P1117 code on a 2003 Ford F150?
Repair costs can range from $50 to $300, depending on whether the issue is a simple sensor replacement or involves more extensive wiring or ECM repairs.
Discuss the causes and fixes for P1117 2003 Ford F150 OBDII Code
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