What is the P0117 fault number? Engine Coolant Temperature (ECT) Sensor Circuit Low Input failure description? How do you fix the P0117 fault code What are the symptoms and causes for the P0117 fault code
What is the P0117 Fault code? What does it signify?
For the engine to function properly, it is essential that the temperature be maintained at the proper level. The engine’s performance can be affected if it runs cold. The engine can become very hot and may cause damage to the components.
The cooling system’s task is to maintain the engine at its optimal operating temperature. Different sensors monitor engine temperature and remove excess heat from coolant. A malfunction in the engine coolant temp (ECT) sensor triggers the P0117 Code. When the powertrain control module, PCM detects a low voltage (less than 0.14 Volts), from the ECT sensor circuit, a code P0117 will be triggered.
The ECT sensor’s job is to monitor engine coolant levels. It sends the information to the PCM for checking the engine coolant ratio, fan operation, ignition timing, as well as other components. The PCM logs P0117 if it detects that the voltage signal is below its normal operating range. The low voltage signal may be caused by extremely hot (above 140°C / 284°F) engine coolant.
There are many vehicles that fall prey to the P0117 fault code, including models from Ford, Toyota and Volkswagen, Mazda, Dodge, Subaru and Proton.
What causes the P0117 Fault code?
Code P0117 can be triggered by many different reasons. Below are some of the most frequent causes.
- – Defective engine coolant temperature (ECT) sensor
- – A problem with the cooling system causing the engine overheat
- – Broken wires or loose connectors to the ECT circuit
- – Open or closed circuit in ECT sensor wiring
- – Air in cooling system
- – The PCM is corrupted or needs to be updated
What are the symptoms for P0117 Malfunction Codes?
These symptoms may be present if you own a vehicle that has the P0117 code.
- – Illumination for the check engine light
- Cold engine can cause the engine to start harder or stop instantly after it starts.
- – The engine might hesitate until it heats up
- – Increased fuel use
- – The engine is not working properly
- Stop Idling
- – Engine overheating
- – Continuous operation cooling fans
- – The PCM could enter failsafe mode (vehicle won’t accelerate if it enters such mode).
Note: Different symptoms may indicate malfunction depending on how the manufacturer programmed their PCM.
How do I fix the P0117 fault code?
- – Clear the codes first and then do a road test to see if it returns.
- – Repair or replacement for the ECT connector
- – Repair and replacement of cables, as necessary
- – Replacing ECT sensor
