What is P0119 fault code? What is the description for Engine Coolant Temperature Sensor Circuit Intermittent Failure? How do you fix the P0119 fault code What are the causes and symptoms of the P0119 error code?
What is the P0119 fault code? What does it all mean?
P0119 means that there is a problem with either the engine coolant temperature circuit (ECT) sensor, or circuit. A code P0119 is triggered when the powertrain control module, PCM, detects that the voltage signal coming from the ECT sensor has become intermittent or erratic over a period of time.
The ECT sensor measures the temperature of engine coolant. It is a two-wire sensor. One wire is the 5V reference signal, the other the ground. It is located in the cylinder blocks, cylinder heads, or intake manifold cooling channels. It is located in the engine cooling line. However, it can be placed anywhere depending on the manufacturer.
The ECT sensor uses a sensor with a negative coefficient. This means that the resistance of the sensor decreases as the temperature increases. Variations in the resistance cause voltage signals to fluctuate. These fluctuations are used to determine engine coolant temperature by the PCM.
Data from the ECT sensors is used to control ignition timing, idle speed, and cooling fan operation. For the engine to work properly, it must read correctly from the ECT sensor. You must immediately respond if you receive a P0119 error code.
The P0119 fault code can affect vehicles of all makes and models, including Chevrolet (especially Cruze), GMC/Buick, Cadillac, Hyundai Kia, Mazda Mercedes Benz, Peugeot, Volvo, Ford, and Mercedes Benz.
Fault code P0119 can be associated with codes P0115 to P0116, and P0117 to P0118.
What causes the P0119 Fault code?
P0119 may be set for many reasons, as with other fault codes. Fault codes are not specific indications of the problem. It indicates potential malfunctioning causes. To determine the root cause of the fault, a thorough diagnosis is necessary. These are the reasons why fault code P0119 should be set:
- – Defective engine coolant temperature (ECT) sensor
- – Problems in the ECT sensor circuit due to corrosion (open or short circuits, damaged wires and/or loose connects).
- – A defective thermostat
- – Low level engine coolant
- – Engine overheating
- – Air in cooling system
What are the symptoms for P0119 Trouble Code?
These symptoms may be present if you own a vehicle that has the code P0119.
- – Illumination for check engine light
- – Idle speed irregularity
- – Engine hesitation during acceleration
- – Engine overheating
- – Defective cooling fan
- – A higher fuel consumption
- – The engine will not start when it is cold
- – The PCM may enter or exit fail-safe mode. This can cause the engine’s to run erratically.
Note: Different symptoms may indicate malfunction depending on the manufacturer’s PCM programming strategy.
How do I fix the P0119 fault code?
- Road testing is necessary to determine if codes will be returned.
- – Check the level of engine coolant. If it is not there, it should be replaced. If the engine coolant level has dropped by a few liters check for any leaks.
- – Repair and replacement cables and connectors for the ECT sensor
- – Test and replacement of the ECT sensor
- – Replacing the defective thermostat
- Repairing a damaged cooling fan
- – Replacing the faulty PCM
How Serious Is the P0119 Fault Code
The urgent need to address Code P0119 is critical as the ECT sensor plays a vital role in engine drivability. If this code is not fixed promptly, it can lead to serious and permanent engine failure. Shorts in the sensor circuit could cause damage to the wiring. If the PCM enters failsafe mode, it could cause vehicle to stop working properly.
