P1117 2008 Ford Fusion 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 2008 Ford Fusion 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 2008 Ford Fusion 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 2008 Ford Fusion?
- 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 2008 Ford Fusion?
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 2008 Ford Fusion 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 2008 Ford Fusion Code
What does the OBDII code P1117 mean for a 2008 Ford Fusion?
P1117 indicates an intermittent issue with the engine coolant temperature sensor, which can lead to inaccurate readings of the coolant temperature.
What are common symptoms of the P1117 code?
Common symptoms include erratic temperature gauge readings, poor engine performance, overheating, and potentially the check engine light being illuminated.
What could cause the P1117 code to be triggered?
Causes may include a faulty engine coolant temperature sensor, damaged wiring or connectors, or issues with the engine control module (ECM).
How can I diagnose the P1117 code?
Start by checking the coolant level, inspecting the coolant temperature sensor and wiring for damage, and using a scan tool to monitor sensor readings against actual engine temperatures.
What repairs are typically needed to fix the P1117 code?
Repairs may involve replacing the engine coolant temperature sensor, repairing or replacing damaged wiring, or addressing any issues with the ECM if necessary.
Is it safe to drive my 2008 Ford Fusion with the P1117 code?
While it may be drivable, it's not recommended as the symptoms could lead to engine overheating or further mechanical issues.
How can I prevent the P1117 code from reoccurring?
Regular maintenance, including inspecting and replacing worn sensors and wiring, can help prevent this code from reappearing.
Can I clear the P1117 code, or will it come back?
You can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely return.
Will the P1117 code affect my vehicle's fuel efficiency?
Yes, an intermittent coolant temperature sensor can lead to improper fuel mixture adjustments, potentially decreasing fuel efficiency.
Discuss the causes and fixes for P1117 2008 Ford Fusion OBDII Code
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