The OBD code P0118 for Ford indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit.
Symptoms include the Check Engine light being illuminated.
Causes may include low coolant level, a faulty ECT sensor, or issues with the thermostat.
This issue is not severe but should be addressed promptly.
A possible fix involves checking and repairing any damaged components in the ECT sensor circuit.
Repair Importance Level | 10.0 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 6.67 (Out of 10) |
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Symptoms of the Ford p0118 OBD Code
The vehicle may experience overheating or poor engine performance with Ford code P0118.
- Symptoms for Ford OBD code P0118: Engine Light ON (or Service Engine Soon Warning Light).
- Temperature gauge reading very high.
- Loss of power during acceleration.
- Engine overheating.
- Possible coolant leaks.
Causes of the Ford p0118 OBD Code
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Possible reasons for Ford P0118 include faulty ECT sensor, wiring issues, or a malfunctioning PCM.
- P0118 can be caused by low engine coolant level.
- A faulty Engine Coolant Temperature (ECT) Sensor.
- A faulty engine coolant thermostat.
- An Engine Coolant Temperature Sensor harness that is open or shorted.
- An Engine Coolant Temperature Sensor circuit with a poor electrical connection.
Fixing Ford Error Code p0118 Step By Step
Address the high voltage input issue in the engine coolant temperature sensor circuit for Ford P0118.
- To fix a Ford OBDII code P0118, start by reviewing the possible causes mentioned above.
- Visually examine the corresponding wiring harness and connectors for any damage.
- Inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Check the coolant temperature sensor for proper operation and connection.
- Replace the coolant temperature sensor if necessary.
- Clear the fault codes and perform a test drive to verify the repair.
Cost Of Fixing Ford p0118 Fault Code
Diagnosing and repairing Ford code P0118 involves testing the engine coolant temperature sensor and related circuits.
The cost to diagnose and fix a Ford OBD code P0118 typically ranges from $75 to $150 per hour for labor rates.
With an estimated repair time of 1. 0 hour, the total cost could be around $75 to $150, depending on shop rates and the complexity of the issue.
Details of the Ford p0118 OBD Code
Code P0118 in Ford vehicles indicates a high engine coolant temperature sensor signal.
Ford OBD code P0118 indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit.
This code is triggered when the ECT sensor sends a signal to the Engine Control Module (ECM) indicating that the engine coolant temperature is too high or too low for the current operating conditions.
The ECM uses this information to adjust fuel delivery and ignition timing for optimal engine performance.
If the ECT sensor or its circuit is faulty, it can lead to drivability issues and poor fuel economy.
Mechanic’s Tech Notes
For Ford code P0118, check the engine coolant temperature sensor circuit for high voltage.
To diagnose and fix OBDII code P0118 on a Ford, start by checking the engine coolant temperature (ECT) sensor circuit.
Use a voltmeter to test the ECT sensor’s resistance and compare it to specifications.
Inspect the wiring harness and connectors for any damage or corrosion.
Ensure the ECT sensor is securely connected and functioning correctly.
If no issues are found, consider replacing the ECT sensor itself.
Additionally, using a scan tool, monitor live data to see if the ECT sensor readings are within the expected range.
If necessary, perform a relearn procedure for the ECT sensor.
FAQ
Common symptoms of OBD code P0118 in a Ford vehicle include Engine Light ON, caused by low coolant level, faulty ECT sensor, or thermostat. Fix: Inspect and repair related components.
The typical cause of OBD code P0118 in a Ford vehicle is a faulty Engine Coolant Temperature (ECT) Sensor or a low engine coolant level.
Diagnose and repair OBD code P0118 in your Ford: Check engine coolant level, ECT sensor, thermostat, wiring harness, connectors for faults. Repair as needed.

Wrap Up
If your Ford is displaying OBD code P0118 along with temperature gauge reading hot, it could be caused by a faulty Engine Coolant Temperature (ECT) sensor, a wiring issue in the ECT circuit, or low coolant level.
To address Ford OBD code P0118, check the ECT sensor for proper operation, inspect the wiring harness for any damage or corrosion, and ensure the connector is securely attached.
Additionally, verify the coolant level is adequate and the cooling system is functioning correctly.