P1116 2002 Ford F150 Code - Engine Coolant Temperature Sensor Out of Self-Test Range
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
- P1116 2002 Ford F150 indicates Engine Coolant Temperature Sensor Out of Self-Test Range.
- 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 P1116 2002 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 P1116 2002 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 P1116 2002 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 P1116 2002 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 P1116 2002 Ford F150 Code
1. What does the OBDII code P1116 mean on a 2002 Ford F150?
P1116 indicates that the Engine Coolant Temperature (ECT) sensor has detected a value that is out of the expected self-test range.
2. What are the common symptoms of code P1116 on a 2002 Ford F150?
Symptoms may include poor fuel economy, engine overheating, difficulty starting, or the check engine light being illuminated.
3. What causes the P1116 code to appear on a 2002 Ford F150?
Common causes include a faulty ECT sensor, wiring issues, a stuck thermostat, or a low coolant level.
4. Can a low coolant level cause the P1116 code?
Yes, a low coolant level can cause the sensor to read improperly and trigger the code.
5. How do I fix the P1116 code on a 2002 Ford F150?
Inspect the ECT sensor and its wiring for damage, check the coolant level, ensure the thermostat is functioning properly, and replace the ECT sensor if needed.
6. Where is the Engine Coolant Temperature (ECT) sensor located on a 2002 Ford F150?
The ECT sensor is typically located near the thermostat housing on the intake manifold.
7. Can I drive with the P1116 code on my 2002 Ford F150?
While the vehicle may still be drivable, it’s not recommended as engine performance and fuel efficiency may be affected, and overheating could cause further damage.
8. How do I test the Engine Coolant Temperature (ECT) sensor on a 2002 Ford F150?
You can test the ECT sensor using a multimeter to check for proper resistance values at different temperatures or use an OBDII scanner to monitor real-time data.
9. Will replacing the thermostat fix the P1116 code?
If the thermostat is stuck open or closed, replacing it could resolve the issue, but first confirm the root cause to avoid unnecessary repairs.
10. How much does it cost to repair the P1116 code on a 2002 Ford F150?
Repair costs can vary but generally include $20-$50 for a replacement ECT sensor and additional labor costs if performed by a mechanic.
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